MENSTRUAL CYCLE

This study tests whether a daily postbiotic supplement can reduce stomach and gut symptoms in physically active women, especially during their menstrual cycle and exercise. About 100 premenopausal female athletes will take either the supplement or a placebo for two menstrual cycl…

This study looks at how natural menstrual cycles and birth control pills affect strength, hydration, and energy balance in 40 female athletes. Researchers will measure muscle strength, body water, and energy use at different times of the month. The goal is to better understand ho…

This study looks at whether the amount of phenylalanine (a protein building block found in food) needed by women changes during different phases of their menstrual cycle. Current recommendations are based on studies in men, so they may not fit women's bodies. Researchers will use…

This study from Johns Hopkins aims to find epigenetic markers in blood that could help identify premenstrual dysphoric disorder (PMDD). Researchers will collect blood samples and track mood changes across the menstrual cycle in 500 women — some with PMDD and some without. The goa…

This study watches 120 women having gallbladder surgery to see if their menstrual phase or menopause changes how much anesthesia they need and how sick they feel afterward. Researchers measure anesthesia use and track nausea and vomiting after surgery. The goal is to learn more, …

This study looks at whether the phase of a woman's menstrual cycle affects the optic nerve sheath diameter, a measure linked to brain pressure, during laparoscopic gynecologic surgery. Researchers will compare women in the follicular and luteal phases, also tracking nausea and co…

This study looks at how antipsychotic drugs might cause metabolic problems in women by affecting how the brain responds to insulin. Researchers will give 15 healthy women a single dose of the antipsychotic olanzapine and insulin nasal spray, then use brain scans to see changes. T…

This study watches 60 women aged 18-40 having nose surgery to see if their menstrual cycle phase affects nausea and vomiting afterward. Researchers also check if a drug called sugammadex, used during anesthesia, changes the risk. No new treatments are tested—just observation of r…

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 looks at how natural menstrual cycles and oral contraceptive use affect muscle protein synthesis after resistance training. Twenty recreationally active women will consume protein drinks and undergo muscle biopsies to measure protein building. The goal is to understand…

This study is looking at 60 women who are getting a hormone-releasing IUD (LNG-IUD) to see if the timing of insertion during their menstrual cycle affects whether they develop ovarian cysts. Researchers will use ultrasound to check for cysts at 0, 3, 6, and 12 months after insert…

This study looks at whether scheduling workouts based on menstrual cycle phases improves fitness in women who exercise regularly. About 111 female athletes will follow different training schedules over three cycles. Researchers will measure changes in aerobic fitness, muscle stre…