The first steps of human development—those that occur within the first few weeks of pregnancy—remain mysterious in many ways. Within a week of fertilization, human embryos form a blastocyst, which ...

Scientists have developed a new human-based endometrial model to study embryonic implantation in the early stages of ...

Who hasn't seen it before: the view through the microscope in which a sperm penetrates an egg cell and fertilizes it. This fundamental step in procreation happens dynamically and seemingly without ...

Scientists have shed light on an important stage of early embryonic development that has never been fully mapped out in humans before. Due to more readily available samples, studies so far have ...

Infertility is a challenge that many couples face and it can affect both men and women. There are various reasons for infertility, such as hormonal imbalances, low sperm count, blocked fallopian tubes ...