By about 1900 the observations of Hertwig, Fol, and others were brought together to make the now-familiar picture: a single ...

Egg cells are our largest cells. They are so large, in fact, that they should have problems distributing proteins and nutrients within themselves. A new study analyzing this little-understood ...

They are also referred to as sex cells. Female gametes are called ova or egg cells, and male gametes are called sperm. Gametes are haploid cells, and each cell carries only one copy of each ...

A novel molecular tool developed by a Lehigh University professor of biological sciences is enabling scientists to precisely ...

Sexual reproduction involves the joining of two sex cells or gametes – the sperm (male gamete) and the egg or ovum (female gamete). The male and female reproductive system The male reproductive ...

One example is follicle-stimulating hormone, which travels from the mammalian brain to the ovary, where it triggers egg release. Some cells also respond to mechanical stimuli. For example ...

they converted male mouse stem cells into female cells and produced functional egg cells. Finally, they fertilized those eggs and implanted the embryos into female mice. About 1% of the embryos ...

The first weeks after a sperm fertilises an egg is a period of dramatic change - from a collection of indistinct cells to something that eventually becomes recognisable on a baby scan. This ...