Continuous Core Body Temperature, Circadian Rhythms, and Fertility

Continuous core body temperature (CCBT) and circadian rhythm patterns are emerging as the gold standard for identifying when you are most fertile.

Phases of the Menstrual Cycle

The science of the menstrual cycle in plain English, including what happens with your hormones, what you can expect to see in each phase, and details about the myth of the 28-day cycle.

How Long Does Sperm Live After Ejaculation?

Whether you’re trying to achieve or avoid pregnancy, knowing how long sperm can live once ejaculated is an important question to answer. Sperm can live outside the body for varying amounts of time depending on several factors.