How effective is birth control?: The difference between using a method perfectly and typically
Researchers measure how well a birth control method works in two ways: perfect-use and typical-use.
Maegan is a former science writer for Clue and an epidemiologist. Thinking about research validity and reproducibility keeps her up at night.
Favorite reproductive health fact: Other than humans, only four other species experience menopause—orcas, short finned pilot whales, beluga whales, and narwhals.
Researchers measure how well a birth control method works in two ways: perfect-use and typical-use.
A happy sex life is an important part of a fulfilling life.
When a miscarriage occurs very early in pregnancy, it can be difficult to tell the difference between a miscarriage and...
FAMs used in conjunction with other forms of contraception, such as condoms or spermicide, can decrease the risk of getting...
Everything you should know.
A 2017 study shows that premenstrual dysphoric disorder (PMDD) might be linked to observable genetic behavior within cells.
It’s quite common to miss birth control pills. What to do depends on what kind of pill you take— the...
Sex hormone binding globulin (SHBG) is a protein that helps to keep your hormones in balance.
Hormones are the messengers of the body, telling it how to breathe and grow.


How androgens, like testosterone, affect everything from menstrual cycles to libido, and how to know if your levels are normal....
Synthetic estrogens are used in hormonal birth control, menopause therapy, and more. Here’s how they're made, what you should know...
Most American and European women will use at least one form of hormonal contraceptive.
There is a lot of discussion about birth control and cancer. Here’s what you should know.
The details we don't learn in school are pretty fascinating.
Free bleeding is the practice of menstruating without blocking or collecting the period flow. Here’s why people do it.
Everyone experiences stress, and for many it’s not an enjoyable experience.
Most people report that some female orgasms are better than others. Clitoral stimulation, orgasms during sleep, exercise-induced orgasms, and more.

It was once thought to have a high association with developing some forms of cancer. But the latest research has...
There might be a connection between your menstrual cycle and your headaches.
Tracking symptoms throughout your menstrual cycle can help you understand your experience of PMS.
During the follicular phase of the menstrual cycle, people tend to have higher levels of antibodies.
You may have heard about TSS, and know that it has something to do with tampons. Fortunately, it’s rare.