The foster dads at first were given a fake egg to care for after wildlife care staff saw them building a nest together ...

In order for pregnancy to happen, sperm needs to meet up with an egg. Pregnancy officially starts when a fertilized egg implants in the lining of the uterus. It takes up to 2-3 weeks after sex for ...

A new "atlas" of early embryonic development in mammals suggests that the process is highly chaotic — but there is some ...

For some, egg freezing (also called fertility preservation) may be an attractive option, offering a sort of reproductive insurance policy against age-related fertility decline. Here’s what to know ...

New research reveals why paternal mitochondrial DNA is banished during development, potentially paving the way for new ...

A groundbreaking discovery has recently brought hope to millions of people living with type 1 diabetes around the world. In a ...

Embryo development starts when a single egg cell is fertilized and starts dividing continuously. Initially a chaotic cluster, it gradually evolves into a highly organized structure. Scientists have ...

In vitro fertilization treatments often cost tens of thousands of dollars, making them too expensive for families whose ...

The little clump of cells looked almost like a human embryo. Created from stem cells, without eggs, sperm, or a womb, the ...

Your doctor can help you plan a healthy pregnancy. In order to get pregnant, sperm needs to fertilize an egg. Pregnancy officially starts when a fertilized egg (embryo) attaches to the wall of your ...