Creating Chimeras
Tazeen Ulhaque
Most organisms have just one set of DNA. So why would some scientists want to work with or create organisms that have two sets of DNA?
a female gamete, which keeps all the parts of a cell after fusing with a sperm.
Confronting Human Chimerism
Tazeen Ulhaque
Most people have just one set of DNA throughout their body. But what happens to humans who are born with two sets?
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.
Preventing Pregnancy with Plan B
Molly Jacobson
Is there any way to prevent pregnancy after sexual intercourse? Learn about Plan B, an emergency contraceptive.
Cells, Frozen in Time
Risa Aria Schnebly
If a living organism freezes, it can die. But by freezing living cells at just the right temperature, scientists can preserve living cells instead of killing them.
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.
Summarizing Sex Traits
Risa Aria Schnebly
Our biological sex affects the way we look in some obvious ways, like deciding what body parts we are born with. But, it also has effects on a range of other sexual traits that you might not expect.
Xs and Ys: How Our Sex Is Decided
Risa Aria Schnebly
Our biological sex determines a lot about the way our bodies look and function. But what determines our biological sex?
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.
Helpful Sex Hormones
Risa Aria Schnebly
Our biological sex is mainly controlled by our sex chromosomes. But sex hormones also influence what body parts and characteristics we have.