Theodora Colborn studied how chemicals affect organisms as they develop and reproduce during the twentieth and twenty first centuries in the US. By the 1940s, researchers had reported that chemicals from agricultural and industrial processes affected how wild organisms developed, but in 1991, Colborn organized the Wingspread Conference in Racine, Wisconsin, at which a group of scientists classed these chemicals as environmentally harmful substances. Colborn and her colleagues called those chemicals endocrine disruptors, as they mimic or block the body's endocrine system. After scientists identified these chimicals and showed that they harm humans and wildlife, US Congress passed several acts to regulate these chemicals and to protect both wildlife and humans from their harmful effects.

In 2004, a team of researchers at Tufts-New England
Medical Center in Boston, Massachusetts, investigated the fetal
cells that remained in the maternal blood stream after pregnancy.
The results were published in Transfer of Fetal Cells with
Multilineage Potential to Maternal Tissue. The team working on that
research included Kiarash Khosrotehrani, Kirby L. Johnson, Dong
Hyun Cha, Robert N. Salomon, and Diana W. Bianchi. The researchers
reported that the fetal cells passed to a pregnant woman during
pregnancy could develop into multiple cell types in her organs. They
studied these differentiated fetal cells in a cohort of women
fighting different diseases. The researchers found that the fetal
cells in the women differentiated into different cell types under
the influence of maternal tissues, and that those differentiated
cells concentrated in the tissue surrounding diseased tissues.
According to the team, this response could be a therapeutic response
to the disease in the once pregnant woman. The research indicated the long
lasting effects of pregnancy in a woman's body.

Dennis Lo, also called Yuk Ming Dennis Lo, is a
professor at the Chinese University of Hong Kong in Hong Kong,
China. In 1997, Lo discovered fetal DNA in maternal
plasma, which is the liquid component of a pregnant woman's
blood. By 2002, Lo distinguished the DNA differences between pregnant women
and their fetuses, enabling scientists to identify fetal DNA in pregnant
women's blood. Lo used his discoveries to develop several
non-invasive and prenatal genetic tests, including tests for blood
group status and Trisomy 21, also called Down's Syndrome.
Lo's discovery of fetal DNA in maternal plasma lessened the risks to pregnant women and fetuses during prenatal testing, and it enabled early
identification of potential genetic mutations in developing
fetuses.

Charles Robert Cantor helped sequence the human genome, and he developed methods to non-invasively determine the genes in human fetuses. Cantor worked in the US during the twentieth and twenty-first centuries. His early research focused on oligonucleotides, small molecules of DNA or RNA. That research enabled the development of a technique that Cantor subsequently used to describe nucleotide sequences of DNA, a process called sequencing, in humans. Cantor was the principal scientist for the Human Genome Project, for which scientists sequenced the entirety of the human genome in 2003. Afterwards, Cantor became the chief scientific officer for Sequenom Inc., a company that provided non-invasive prenatal genetic testing. Such tests use a pregnant woman's blood to identify genetic mutations in a fetus during the first trimester of pregnancy.

Gordon Watkins Douglas researched cervical cancer, breach delivery, and treatment of high blood pressure during pregnancy in the US during the twentieth century. He worked primarily at Bellevue Hospital Center in New York, New York. While at Bellevue, he worked with William E. Studdiford to develop treatments for women who contracted infections as a result of illegal abortions performed throughout the US in unsterile environments. Douglas also established the first contraception and pregnancy termination clinic at Bellevue Hospital shortly after the legalization of abortion as a result of the 1973 US Supreme Court ruling in Roe v. Wade. Furthermore, Douglas showed that fetal and maternal cells exchange between the pregnant woman and fetus during pregnancy, which led to the later development of non-invasive prenatal testing in the early twenty-first century.

Prior to the legalization and regulation of abortion and contraception in the late twentieth century, women could not readily access safe birth control, abortion, and other reproductive health options at clinics and doctor's offices. Thus, women sought out alternative means to control their reproduction that were often illegal, unreliable, and unsafe, often because they were provided by untrained reproductive health care providers. The untrained providers who performed unregulated reproductive health services during the 1800s through the mid 1900s were often referred to as "female physicians," despite not having any formal medical background. Those providers filled a demand to serve women who were not able to tend to unwanted pregnancies and other reproductive issues on their own, but their role in the history of women's health has not been well understood. I have investigated the following questions: (1) How have women sought alternative non-medical approaches to managing reproduction, and (2) what historical patterns and situations can we see showing that non-medically trained people were active in the reproductive lives of women throughout the 19th and 20th centuries in the US? To study this, I have engaged in historical review methods to trace the evolution of reproductive health care providers and educators. Specifically, I have examined historically active people, organizations, and events that involved women seeking alternative care and how the state of women's health care effected women's medical outcome. Through my investigation, I found a large number and variety of non-medical providers and approaches to women's reproductive health solutions due to an unmet need for reproductive healthcare and restrictive laws. Women obtained concocted birth control pills, illegal abortions, home-brewed menopause relief treatments, and learned how to give self cervical examinations from non-medical providers. In response to the rigidity of the male dominated medical field, non-medical forces intervened and women's healthcare evolved beyond the traditional male physician's office into supportive healthcare groups like Planned Parenthood. My findings are relevant in the ongoing political debates surrounding issues like contraception and abortion access. By demonstrating the struggle for sound standard of care for non-medical reproductive health care providers during the nineteenth and early twentieth century, this project emphasizes what the standards of reproductive health care for abortion and contraception might be like if the organizations that made them so readily available, like Planned Parenthood, were defunded or criminalized in our modern setting.

Background: Breast cancer affects about 12% of women in the US. Arguably, it is one of the most advertised cancers. Mammography became a popular tool of breast cancer screening in the 1970s, and patient-geared guidelines came from the American Cancer Society (ACS) and the US Preventative Task Force (USPSTF). This research focuses on ACS guidelines, as they were the earliest as well as the most changed guidelines. Mammography guidelines changed over time due to multiple factors. This research has tracked possible causes of those changes. Methods: Research began with an extensive literature search of clinical trials, the New York Times and the Washington Post archives, systematic reviews, ACS and USPSTF archives. Results and Discussion: ACS was the first organization to provide easily accessible patient geared mammography guidelines. The guidelines have changed six times since 1976. The first came after a large clinical trial, which screened 60,000 women and showed that mammography use decreased breast cancer deaths by 30%. During the 1980s and 1990s, anti-cancer lobbyists and health insurance companies were in conflict, as the former pushed for more frequent mammography screening while the latter pushed for less. The USPSTF published their first guidelines in 2002, separated women into different age groups, and suggested screening intervals, but also included a rating of evidence quality (A-I) that supported the screening recommendation. They changed in 2009 and 2016. The frequent changes had different, not all purely scientific and evidence-based causes. The political influence of anti-cancer activists, as well as media coverage, increased public interest in mammography, which in turn influenced changes in mammography guidelines, sometimes against scientific evidence. Most changes moved towards more frequent screening for women older than 40, and less frequently for younger women, probably because multiple clinical trials had found that mammography was not useful for younger women with no history of breast cancer. There was also growing evidence of overdiagnosis and overtreatment risks from frequent mammography use. Conclusions: The patient-geared mammography guidelines have changed due to multiple and not always well-grounded factors, such as public interpretations of mammography usefulness, social attention to mammography, and influence of different stakeholders at the time. Some changes have resulted solely from political and social factors, disregarding building scientific and clinical evidence against frequent mammography use.

The Dynamic Landscape of Abortion Law in the United States explores the ways abortion laws have changed in the United States over the course of US history. Abortion laws in the US have historically been fluid, changing in ways both big and small. Those changes can occur after advances in science, changes in understanding, or changes in public opinion. And there have been various periods in the history of the US where tolerance abortion waxed or waned, and common law reflected those attitudes. Roe v. Wade was a pivotal moment in the history of abortion law that accomplished much in the way of broadening women's access to abortions. But Roe v. Wade was not the beginning or the end of the fight for abortion rights in the US. There were legal abortions prior to Roe v. Wade and illegal abortions after. Roe v. Wade granted that women had a constitutional right to have an abortion but the ruling left the boundaries of that right somewhat undefined and most courtroom battles over abortion laws are fought over where a woman's right to an abortion ends and a States right to regulate and protect fetal life begin. Much change has occurred in abortion laws over the past 50 years, this thesis tracks those changes principally through Supreme Court Cases, such as United States v. Milan Vuitch, Roe v. Wade, and Gonzales v. Planned Parenthood among others. The landscape of abortion law in the US continues to shift today, as recently as 2017 with Plowman v. FMCH cases were being heard in courts that wrought subtle yet important changes in abortion law.

Scientific and public interest in determining the sex of a child prior to conception has a longstanding history. Since at least the fourth century BC, people have been interested in what determines whether a child will be a boy or a girl. It was not until the mid 1800s, when scientists first discovered female eggs and male sperm, and further learned that the combination of the genetic make-up of those sex cells began the process of conception, that science began to take precedence over popular beliefs and scientists began to make discoveries about the reproductive process in humans. In the mid-twentieth century, two methods of sex selection emerged based on the idea that human male sperm cells are physically different based on which sex chromosome they carry, either X or Y. The first type of method gained popularity in the 1960s and involved timing intercourse throughout the female menstrual cycle. The two timing methods of sex selection outlined in this paper are the Shettles Method and the Whelan Method. The second type of method was based on the idea that the physical differences between the two types of sperm cells allow for sperm cell separation using technology. The method that is outlined in this paper is called the Ericsson Method of Sperm Separation, and this paper also outlines a company called Microsort that utilizes this technology. However, many studies that tested the methods based on differences in the two types of male sperm were inconclusive, meaning that the methods were supported by some and rejected by others. Despite the evidence that can neither prove nor contest those methods with absolute certainty, their popularity has been maintained in the public eye. By questioning methods of sex selection since their early development, and often discovering that they are unreliable, scientists have increased the creative and technological capacity of the field of reproductive health. The presentation of these methods to the public, via published books on timing methods and company websites for sperm sorting, increased interest in, and influence of, sex selection within the global society. The purpose of explaining the history, interest, development, and impact of various sex selection methods in the mid-twentieth century based on the information that is available on them today is to show couples which methods have failed and provide them with the knowledge necessary to make an informed decision on how they choose to go about utilizing methods of sex selection. This paper also reflects on the ethical considerations of sex selection. The ethical considerations demonstrate the influence that sex selection has on both a global and local scale and how it is being managed in different parts of the world. This allows an individual member of the public to determine what they consider to be an ethical decision based on this information, in addition to an informed decision about the methods if they wish to go through with choosing the sex of their child.

In the late nineteenth century, the Comstock Act of 1873 made the distribution of contraception illegal and classified contraception as an obscenity. Reflecting the predominant attitude towards contraception at the time, the Comstock Act was the first federal anti-obscenity law that targeted contraception. However, social acceptance of birth control changed at the turn of the twentieth century. In this thesis, I analyzed legislation, advocates, and literature pertinent to that social change to report on the events leading up to the decriminalization of contraception. Because of the complexity of social history, I used legislation and court cases to track pivotal movements that reflected a change in the accessibility and acceptability of birth control. I focused on the efforts of two prominent birth control advocates, Margaret Sanger and Mary Dennett, and analyzed the impact of their efforts in that social movement. I learned that they incited court cases that questioned the validity of the Comstock Act and helped influence societal acceptance of birth control. Through my research, I discovered that the medicalization of contraception influenced its decriminalization and acceptance by society.