or womb is a major female reproductive sex organ of most mammals including humans. It is within the uterus that the fetus develops... more

An ultrasound showing a blurry image of a fetus.

How Fast Do Embryos Grow?

Megha Pillai Logan Hunt

We start off as a single tiny cell, and yet somehow we are born as whole humans. Get to know the stages of that process and how quickly we develop.

The silhouette of a pregnant person with a fetus inside, and different shapes symbolizing blood types.

When Blood Types Shouldn’t Mix: Rh and Pregnancy

Logan Hunt

A pregnant person's blood type is usually compatible with the fetus’s blood type. But what happens when that’s not the case?

An illustration of a female reproductive system with a ruptured fallopian tube with red blood drops coming out of it

Ectopic Pregnancy: An Unexpected Path

Logan Hunt

Pregnancy isn’t perfect, and many things can go wrong. What happens when a growing embryo is in the wrong part of the pregnant person's body?

A small T shaped piece of plastic resting in an open palm

Introducing the IUD

Molly Jacobson

Doctors place Intrauterine Devices (IUD) in the bodies of some females to help prevent pregnancy. Learn about how these devices work and how long they’ve been around.

Plan B One-Step Emergency Contraception packaging

Preventing Pregnancy with Plan B

Molly Jacobson

Is there any way to prevent pregnancy after sexual intercourse? Learn about Plan B, an emergency contraceptive.

A red alarm clock sitting on top of a pile of green sanitary pads next to a tampon

What Is the Menstrual Cycle?

Emily Santora

Most girls around the world have periods, but how and why do periods happen? Periods are part of the menstrual cycle, which is an essential part of the female reproductive system.

An image of ovaries in a person with PCOS. The image features an external look at a bumpy ovary attached to the rest of the female reproductive system, as well as a close-up, detailed look at the cysts within the ovary.

The Mysterious Case of the Missing Periods

Emily Santora

Estrogen and testosterone are two hormones that cause puberty. But what happens when the body doesn’t produce the amounts of hormones that it usually does?

A woman clutching her abdomen, experiencing period cramps.

Periods: What Should You Expect?

Emily Santora

Sometimes things don’t work as you expect them to, including periods. Learn more about what causes some girls to have irregular or painful periods.

Focusing on Female Infertility

Emily Santora

What happens when a person wants to have a baby, but after years of trying, it just doesn’t happen? A lot of people want to become pregnant, but let’s learn about what may prevent pregnancy.

Shedding Light on Endometriosis

Emily Santora

A lot of illnesses, like colds, have very visible symptoms, but other conditions are not so obvious. Learn about how people spot and treat a condition called endometriosis.

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