Cycle length and ovulation timing On average, the length of a menstrual cycle is 28 days. But per individual, this duration has a broader range – lasting anywhere from about 21 to 35 days.

Find out how AI and salivary ferning may transform ovulation prediction for irregular cycles. Keep reading for details.

Medically reviewed by Lulu Zhao, M.D. Reviewed by Yamel Belen, R.N., IBCLC If you're trying to conceive, you may be wondering ...

The menstrual cycle starts the first day of a period. When a pregnancy doesn’t occur, levels of the hormones estrogen and progesterone drop, causing the lining of the uterus to shed. [2] ...

The morning-after pill helps prevent pregnancy after unprotected sex, but its efficacy differs depending on the user's body ...

Typically, ovulation happens every month as part of the menstrual cycle, says ob-gyn Christine Greves, MD. If you ovulate and the egg is fertilized, it can result in a pregnancy.

A spokesperson for another popular cycle tracking app, Glow, said in an emailed statement that “we will continue to uncompromisingly protect our users’ privacy and personal health information.

Polycystic ovary syndrome (PCOS) is a condition that affects how the ovaries work. Normally, your ovaries make hormones that play an important role in menstruation and pregnancy.