Implantation usually occurs 6 to 12 days after conception. Common signs include bleeding and cramps.

Early lab work shows reprogrammed skin cells can yield embryos, hinting at future infertility solutions but raising safety ...

Despite significant biomedical advances in recent decades, the very earliest events of human development¬--those that occur during a critical window just after fertilization--have remained an ...

A reproductive medicine professor described the work as an “exciting proof of concept” that may change approaches to ...

Human bodies have to be built from a single egg cell that's fertilized by a sperm cell. Many rounds of cell division occur as the body is developing, and it seems that there are plenty of chances for ...

When couples experience infertility, medical science presents possible solutions for a potentially successful conception of a baby. Infertility issues can be addressed with Human Chorionic ...

Scientists based at The Rockefeller University have created an experimental system that models the implantation of a human embryo. The new system, an adaptation of one used to recapitulate the ...

The technique, still in its early stages, could eventually help people facing age, illness, or same-sex infertility become ...

Multiple genetic changes can occur before or early after conception, a new study describes. The researchers looked at a type of genetic change called copy number variants, which refers to the number ...

The embryos all had chromosomal abnormalities and weren’t meant to lead to a pregnancy. But the results open up questions ...