Hormonal birth control

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aprilie 10, 2026

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aprilie 10, 2026

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"In Britain, government control over the manufacture and supply of pharmaceutical drugs had been tightened in 1947 and 1957. Such restrictions, however, primarily concerned dangerous drugs and self-medication drugs, as well as biological products (e.g., antibiotics, vaccines, and insulin, all of which had to best and ardized by biological techniques). Products had to be scrutinized to insure that their manufacturing methods and potency testing met the stipulated requirements. Drugs subject to these restrictions were only a small minority in the pharmacopoeia. All other drugs could be released onto the British market without submitting to any formal procedure. In general, the British government took a laissez-faire approach toward pharmaceutical companies in the1950s. The only restriction imposed on drugs in this period was that they could not be advertised as curing cancer, venereal disease, or Bright’s disease. Britain and the United States thus had very limited testing requirements when the first pill was initially approved, and Enovid underwent governmental premarket review only in the United States. The 1938 Food, Drug and Cosmetic Act specified that a drug is not defined by its ability or lack of ability to treat a disease, but rather as any product “affecting the structure or function of the body.” This language had been incorporated into the 1938 law for the explicit purpose of giving the FDA jurisdiction over products such as obesity drugs (obesity was not considered a disease), nose straighteners, and especially contraceptive devices such as pessaries and condoms, which, like oral contraceptives, had both therapeutic and contraceptive applications. Therefore, by definition, Enovid was a product that clearly fell under the jurisdiction of the FDA."

- Hormonal birth control

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"Searle had originally asked the FDA to consider simultaneously an application for three dosages of Enovid: 10, 5, and 2.5 milligrams. Searle was particularly interested in promoting the lower dosage forms of Enovid because one of the chief criticisms of the pill up to this point had not been a medical one, but rather an economic one. Partly developed in response to concerns about world hunger, it was feared that Enovid would prove far too expensive for woen in poorer countries. The cost of the hormone was directly proportionate to the cost of the drug and the dose. Lowering the dose significantly lowered the cost of Enovid. Searle, therefore, had great incentive to prove the safety and efficacy of its lower dosage pills. As far as Searle officials were concerned, the lower dose of Enovid should not have required a separate NDA because they considered it merely an alternative dose of the same drug. As one Searle representative wrote when seeking approval of the lower dosage: “[I find it] very difficult to understand how less of a drug can be more dangerous than a larger dose...a basic fact of any drug use is adjustment of the dosage to a particular individual’s requirement. That’s all we are trying to do with the lower dosage forms of Enovid....I find it impossible to understand how one increases danger by reducing the dose.” The FDA, however, viewed the dosage question as an issue of efficacy and possibly safety in 1959. The lower doses produced an increased incidence of breakthrough bleeding. It was not immediately clear whether this was an indication that ovulation had not been effectively suppressed. If so, it would have undermined Enovid’s effectiveness as a contraceptive, rendering it unapprovable. The FDA was therefore very cautious in considering any alteration in the original dose formulation of the pill."

- Hormonal birth control

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"In Britain, publicity over the pill’s potential risks reached a crescendo in late 1969, when a number of British medical journals and popular newspapers published articles accusing the medical profession of being too complacent on the links between the pill and thrombosis. The debate intensified in December 1969 when Professor Victor Wynn, an endocrinologist and an expert on metabolic effects of anabolic steroids, appeared on a David Frost television program and detailed before millions of British viewers a panoply of risks associated with the pill. Appearing in a total of three Frost programs that month, one of which was broadcast to an audience in the United States, Wynn’s testimony caused public and parliamentary uproar. These broadcasts, together with the publication of the British epidemiological studies linking the pill with thrombotic complications, resulted in the British government warning doctors to no longer prescribe the higher dose (10-milligram) pills. In the United States, an impassioned public debate on the safety of the pill had also been inaugurated with the publications of journalists Morton Mintz and Barbara Seaman. Both journalists challenged what they characterized as the “diplomatic immunity” which had dominated news about the oral contraceptives up to that time by questioning not only the overall safety of the pill but the way in which the U.S. regulatory authorities had approved it. Mintz, in particular, widely publicized as fact that the pill had been tested on only 132 women prior to its approval for contraception and that its safety had not been proven before it went on the market. By the end of 1969 Senator Gaylord Nelson called for congressional hearings (known as the Nelson hearings) on the safety of the pill. The primary focus of the Nelson hearings was on safety and informed consent: Had women been adequately informed about the risks and significant side effects of the pill? Should the pill be removed from the market, or should new studies be instituted?"

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"The pill, of course, is still on the market, and although it is still controversial in some corners, the social and medical concerns it originally engendered have now been supplanted by concerns over the abortion drug RU-486, approved in the United States in 1999. The pill, like other drugs before and after it, added experience and knowledge that strengthened the regulatory process. Moreover, early and continuing public criticism of the pill and its approval was crucial in opening up the larger debate over the safety, labeling, and information provided to consumers of prescription drugs in both countries. Seaman’s tireless, and at times heroic, efforts to mandate a “patient package insert” for the oral contraceptives cannot be overlooked as a major contribution to the history of the women’s health movement. Because of the knowledge gained from Enovid/Conovid, pharmaceutical researchers have gone on to create a new generation of oral contraceptives which are, in the words of journalist Robin Herman,“99.9% effective,” but are generally safer and have far fewer side effects than any of the original pill formulations. Only in 1995 was it established that a mutant gene (called factor V Leiden) puts some women at increased risk of venous thrombosis. With the recent commercial availability of genetic screening for this gene, women now have the option of being screened before they take the pill."

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"Today, the science is more settled, though there hasn't been a long-term study on the continuous use of oral contraceptives yet. But based on data from the long-term use of non-extended cycle birth control pills, which are chemically the same as extended cycle contraceptives, gy-necologists have largely reached the conclusion that the practice is safe. "At this point, I can't think of any OB/GYNs that would have a problem with [extended cycle oral contraception]," says Dr. Lauren Naliboff, a fellow at the American Con-gress of Obstetricians and Gynecologists. A study by the Cochrane organization found that women on extended cycle pills "fared better in terms of headaches, genital irritation, tiredness, bloating, and menstrual pain" than those on pills with monthly bleeding. A peer-reviewed article by Acta Obstetricia et Gynecologica Scandinavica acknowledged that long-term studies are lacking, but ultimately concluded that continuous use oral contraceptives showed no unique side effects beyond increased spotting, and still resulted in less "bleeding days" than non-continuous birth control pills. Philosophical and scientific debates aside, perhaps the largest barrier between women and their right to decide whether or not they want to bleed is a lack of information. Many women are una-ware that consistently skipping withdrawal bleeding is an option, let alone that extended cycle pills ex-ist, or that menstrual suppression can also be accomplished with hormonal IUDs, NuvaRing, birth control injections, and contraceptive patches."

- Hormonal birth control

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"What Pike discovered in Japan led him to think about the Pill, because a tablet that suppressed ovulation—and the monthly tides of estrogen and progestin that come with it—obviously had the potential to be a powerful anti-breast-cancer drug. But the breast was a little different from the reproductive organs. Progestin prevented ovarian cancer because it suppressed ovulation. It was good for preventing endometrial cancer because it countered the stimulating effects of estrogen. But in breast cells, Pike believed, progestin wasn’t the solution; it was one of the hormones that caused cell division. This is one explanation for why, after years of studying the Pill, researchers have concluded that it has no effect one way or the other on breast cancer: whatever beneficial effect results from what the Pill does is cancelled out by how it does it. John Rock touted the fact that the Pill used progestin, because progestin was the body’s own contraceptive. But Pike saw nothing “natural” about subjecting the breast to that heavy a dose of progestin. In his view, the amount of progestin and estrogen needed to make an effective contraceptive was much greater than the amount needed to keep the reproductive system healthy—and that excess was unnecessarily raising the risk of breast cancer. A truly natural Pill might be one that found a way to suppress ovulation without using progestin. Throughout the nineteen-eighties, Pike recalls, this was his obsession. “We were all trying to work out how the hell we could fix the Pill. We thought about it day and night.”"

- Hormonal birth control

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"Today, a growing movement of reproductive specialists has begun to campaign loudly against the standard twenty-eight-day pill regimen. The drug company Organon has come out with a new oral contraceptive, called Mircette, that cuts the seven-day placebo interval to two days. Patricia Sulak, a medical researcher at Texas A. & M. University, has shown that most women can probably stay on the Pill, straight through, for six to twelve weeks before they experience breakthrough bleeding or spot-ting. More recently, Sulak has documented precisely what the cost of the Pill’s monthly “off” week is. In a paper in the February issue of the journal ‘’Obstetrics and Gyne-cology’’, she and her colleagues documented something that will come as no surprise to most women on the Pill: during the placebo week, the number of users experiencing pelvic pain, bloating, and swelling more than triples, breast tenderness more than doubles, and headaches increase by almost fifty per cent. In other words, some women on the Pill continue to experience the kinds of side effects associated with normal menstruation. Sulak’s paper is a short, dry, academic work, of the sort intended for a narrow professional audience. But it is impossible to read it without being struck by the consequences of John Rock’s desire to please his church. In the past forty years, millions of women around the world have been given the Pill in such a way as to maximize their pain and suffering. And to what end? To pretend that the Pill was no more than a pharmaceutical version of the rhythm method?"

- Hormonal birth control

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"First there’s Rock, a Harvard fertility expert and a developer of the pill. There’s a longstanding myth that Rock, a Catholic, designed the pill in the 1950s with the church in mind and included a week of hormonal withdrawal — and therefore bleeding — to make his invention seem more natural. In fact, the thought never crossed his mind, the Rutgers University historian Margaret Marsh says. Instead, it was Gregory (Goody) Pincus, the other developer of the pill, who suggested that the pill be given as a 20-days-on, 5-days-off regimen. Pincus wanted to provide women in his trials with reassurance that they weren’t pregnant, and to know himself that the pill was working as a contraceptive. Rock agreed. After the F.D.A. approved the pill in 1960, however, those few days of light bleeding took on a new significance. Anticipating the church’s opposition, Rock became not just a researcher but also an advocate. In his 1963 book “The Time Has Come: A Catholic Doctor’s Proposals to End the Battle Over Birth Control,” he argued that the pill was merely a scientific extension of the church-sanctioned “rhythm method.” It “completely mimics” the body’s own hormones, he wrote, to extend the “safe period” in which a woman could have intercourse and not become pregnant. “It must be emphasized that the pills, when properly taken, are not at all likely to disturb menstruation,” he wrote. “It has been my consistent feeling that, when properly used for conception control, they merely serve as adjuncts to nature.” He was stretching the truth. Rock knew that the pill’s synthetic hormones caused the lining of a woman’s uterus to thin out, making it inhospitable for a fertilized egg. During the off week, when the hormones were withdrawn, her body got the signal that it was time to shed the lining. But because this event didn’t involve ovulation, it was better described as withdrawal bleeding than menstruation."

- Hormonal birth control

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"Ludwig Haberlandt is the 1st great name in hormonal contraception. As early as 1919 he was conducting studies which showed that transplants of tissues or extracts of these tissues (now known to contain progesterone) could produce infertility in rabbits and mice. In 1930 Reiprich of Breslau suggested that the antifertility action of estrogen might be the result of pituitary inhibition. In 1938 ethinyl estradiol was synthesized and 1 year later Dodds and his group reported the synthesis of a series of nonsteroidal estrogens (stilbestrol, hexestrol, and dienestrol). None of the clinical trials conducted in the 1940s could have demonstrated the superiority of 1 estrogen over another with respect to ovulation inhibition at equivalent estrogenic dosage. Studies of this aspect lagged until the 1960s. At that time it was clearly demonstrated that the ethinyl side-chain imparted an augmented pituitary inhibiting potency to estradiol as compared either to other natural estrogens or to other synthetics. It was a fortunate accident that the early clinical preparations of contraceptive progestins contained about 1% contamination with mestranol from the process of manufacture. While this quantity appeared trivial to the chemists, the presence of about 150 mcg of mestranol in the original 10 mg doses of the 19-norprogestins could have accounted totally for their contraceptive efficacy. It was not until several years later than estrogen-free norprogestins were prepared and their intrinsic antiovulatory action proven. When these purified progestins were used for contraceptive therapy, an increased incidence of menstrual irregularities appeared. One standardized quantity of ethinyl estrogen was reincorporated into contraceptive preparations for the control of menstrual regularity, but without any idea that a contribution was being made to contraceptive effectiveness. Clinical studies with continuous low-dose progestin only formulations have demonstrated that their effectiveness in inhibiting ovulation is substantially lower than that of sequential or combination type preparations. A progestational agent added to a baseline estrogen dose appears to produce a greater suppression of plasma gonadotropins than estrogen by itself. While cyclic estrogen administration is capable of inhibiting ovulation with a high degree of efficiency, such a therapeutic regimen is impractical from the point of view of menstrual regularity. The entire matter of cardiovascular hazards related to OC use has been called into question by studies of mortality statistics in the U.S., Great Britain, and Taiwan. In none of these studies is the predicted mortality from cardiovascular disease in OC users confirmed."

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"Ludwig Haberlandt (1 February 1885 - 22 July 1932), pioneer in hormonal contraception, was born in Graz, where he graduated from the university in 1909 in medicine summa cum laude and began his career as a physiologist. The idea of temporary hormonal contraception in the female body entered his mind in February 1919, when he was already Professor of Physiology in Innsbruck. He pursued his project ambitiously and by 1921 demonstrated temporary hormonal contraception in a female animal by transplanting ovaries from a second, pregnant, animal. From 1923, after further successful scientific work in this field, he began highlighting the importance of clinical trials in presentations. From then, he was criticized by his colleagues, who accused him of hindering unborn life. His idea was contradictory to the moral, ethic, religious and political agendas of that time in Europe. In 1927 official reports escalated, his family was ostracized by the local population, and Ludwig Haberlandt refused any further interviews. Against all opposition, in 1930 he began clinical trials after successful production of a hormonal preparation, Infecundin, by the G. Richter Company in Budapest, Hungary. Although at the peak of his scientific career, he was unable to pursue other scientific agendas because of the disputed contraception project. After he committed suicide, on 22 July 1932, scientific discussion about hormonal contraception ceased until 1970 when scientists began referring to his earlier medical and scientific work."

- Hormonal birth control

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"By 1960 the world's population had grown to around 3 billion people, having taken just 33 years to increase from 2 billion.1 Although many agreed that growth rates needed to fall, couples at the time had few reversible contraceptive choices: mainly barrier methods, spermicides, and a few plastic-only and metal-based intrauterine devices (IUDs). Many relied on ‘withdrawal’. This was soon to change dramatically because during the 1950s scientists had patented two synthetic progestogens, norethisterone and norethynodrel.2 Clinical studies showed that these hormones inhibited ovulation, although some accompanying oestrogen (initially mestranol, now ethinylestradiol) was needed for acceptable breakthrough bleeding and pregnancy rates. The first combined oral contraceptive was marketed in the US in 1960, and in the UK the following year. Many women enthusiastically embraced ‘the pill’; for some because it separated contraception from the act of intercourse and for others because it could be used without their partner's knowledge. Early on, howev-er, concerns were expressed about the method's carcinogenic potential, and about reports of associated venous thromboembolic and other cardiovascular events.2 Furthermore, the unfolding thalidomide tragedy of the early 1960s provided a powerful reminder of the epidemiological truth that when millions of people use a medicinal product small increases in risk still result in many people affected."

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"Oral contraception is now one of the most scrutinised medicinal products on the market. Two British investigations that celebrated their 40th anniversaries in 2008 have been major contributors to the evidence base for current clinical practice. Both illustrate the enormous research opportunity of NHS clinical records. The Oxford/Family Planning Association (Oxford/FPA) Study began in 1968, when 17 family planning clinics in England and Scotland started recruiting 17 000 white, married women using oral contraception, the IUD or the diaphragm.3 The Royal College of General Practitioners' (RCGP) Oral Contraception Study started at the same time, with 1400 GPs throughout the UK recruiting 47 000 mainly white, married (or living as married) women, half of whom were using oral contraception. Both studies have followed up their cohorts through a mixture of clinic or practice reports, personal contact, and the cancer and death notification services of the NHS Central Registries. Each study has provided, in different ways, key insights into the effects of different contraceptives; as well as novel information about other women's health issues. For example, the RCGP study was the first to show that the risk of cardiovascular disease is much higher in pill users who smoke,5 especially among older women, and that the risk of hypertension and arterial disease is related to the combined pill's progestogen content.6 The Oxford/FPA study assessed the effectiveness, safety, and return to fertility after stopping different methods. Long-term mortality and cancer results from both studies have been reassuring."

- Hormonal birth control

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"Natural progesterone was hard to come by. Extracting it from animal sources was difficult, time consuming and prohibitively expensive. Natural progesterone drug therapy required huge doses to be effective, and at a cost of anywhere from $80 to $1,000 per gram, only the richest patients could afford the treatment. The only customers for the drug turned out to be world-class race horse breeders, who used it to improve the fertility of their mares. Aside from the high cost, the drug had to be given as an injection, and the shots were painful and not well metabolized. Unless researchers could find a way to produce a highly effective synthetic oral dosage of the hormone, the treatment would remain impractical. In 1943 a chemist by the name of Russell Marker came up with the answer. As a professor at Penn State, Marker had discovered a way to extract progestprogesterone from plant material. Soon after, he was able to create synthetic estrogen from vegetation as well. His path-breaking process, which became known as the "Marker Degradation," remains the basis of synthetic hormone production today. Marker still needed to find a plant that could yield enough progesterone to make mass production possible. He traveled across America in search of the right source, but came up empty-handed. Unwilling to abandon his quest, he headed south to Mexico in search of a plant called cabeza de negro that he had read about by chance in a dusty old regional Texas botany book. His hunch was correct, and the giant tubers proved to be an excellent source for the cheap mass production of progesterone."

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