In a common metaphor used to describe human fertilization, sperm cells are competitors racing to penetrate a passive egg. But as critics have noted, the description is also a “fairy tale” rooted in ...

The following references illustrate the fact that a new human embryo, the starting point for a human life, comes into existence with the formation of the one-celled zygote: "Development of the embryo ...

Fertilization occurs in the fallopian tubes. The fertilized egg may then implant on the wall of the uterus, leading to pregnancy. There are many misconceptions about fertilization and pregnancy. While ...

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 ...