If you're trying to become pregnant without success, you're not alone. An estimated 11% of women and 9% of men in the United ...

The doctor then places the eggs in a dish with sperm isolated from the male partner’s semen. The fertilized eggs grow in an ...

Roads to Family: All the Ways We Come to Be (Lerner Publishing Group), uses real life stories to explain the science of human ...

The development of maternal egg cells is pivotal for survival—but also precarious. During meiosis, the DNA-containing ...

Most male birds lack external genitals and transfer sperm through the cloaca, which is the same opening where waste is excreted. Some birds, like Ducks and Geese, do have a penis, which is used for ...

The Alabama Supreme Court ruled in February that embryos held in storage by IVF clinics are "extrauterine children." ...

consists of 191 amino acid residues The anti-YWK-II antibody can agglutinate human sperm, interfere with sperm-egg interaction, and arrest the growth and development of zygotes or embryos [1] BS ...

The research team that sought to cure infertility included one remarkable woman. Here's what's fact and what's fiction in her ...

In 1896, in his seminal work “The Cell in Development and Inheritance”, the cell biologist Edmund B. Wilson formulated a ...