Human reproduction is an inefficient process, with less than one third of conceptions leading to live births. Failure of the embryo to implant in the uterus is one of the main causes of miscarriage.

A UCSF-led research team has identified the first molecular step that allows a week-old human embryo to attach to the uterus. The finding is expected to provide a new tool to diagnose and treat ...

Common implantation symptoms include cramping and spotting, or very light bleeding, but those same signs can also be indicative of a normal menstrual cycle. So how do you know when your symptoms ...

Researchers funded by the National Institutes of Health have discovered how an embryo initially attaches to the wall of the uterus—what appears to be one of the earliest steps needed to establish a ...

VANDERBILT One of the most vexing causes of infertility is the failure of the embryo to implant in the uterus. It's estimated that roughly three-quarters of all embryos fail to implant properly. And ...

Some people may experience mild cramping during early pregnancy while others may not. Implantation bleeding can also occur with or without cramps. Pregnancy happens when an egg is fertilized by sperm ...

Implantation occurs around 10 days after ovulation, following the release of an egg. Signs of implantation can be very subtle. Some women have very light spotting, known as implantation bleeding, or ...

Your body undergoes a dramatic process from the time of conception to the first positive pregnancy test. One of the most significant steps is implantation. Implantation is an early sign of pregnancy ...