Fertility

This observational study looks at fertility decisions and outcomes in young women diagnosed with breast cancer in China. Researchers will follow women who had no children before their diagnosis to see if they later gave birth, and how often they used fertility preservation method…

This study surveys 1,500 former Norwegian elite athletes to map their mental and physical health after retirement. Researchers focus on differences between weight-sensitive sports, such as weight-class, aesthetic, and endurance sports, and less weight-sensitive ones. They will ex…

This study looks at different ways to track ovulation and the luteal phase using the Premom app. Thirty women will record cervical mucus, urine test results, and body temperature over three cycles. The goal is to see which combination of signs gives the most accurate picture of w…

This study follows 100,000 Chinese families from before pregnancy through the child's teenage years. Researchers collect health data, biospecimens, and environmental information to understand how parents' exposures affect pregnancy outcomes and child development. The goal is to f…

This observational study follows 2000 women aged 40 or younger with breast cancer to see how having a baby after diagnosis affects their survival and disease return. It also checks the growth and health of their children. The goal is to gather information, not to test a new treat…

This study was designed to see how a hormone called GnRH is processed by the body when given through a small pump (OmniPod) instead of a needle. It was meant for healthy women aged 18 to 40 with regular periods. However, the trial was withdrawn before any participants were enroll…