Male and female reproductive systems allow human reproduction. Fertilisation occurs when a sperm and egg join to form an embryo. An embryo develops into an unborn baby in the uterus during pregnancy.

Early in fetal development, a mass of cells known as the bipotential gonad has the possibility of giving rise either to ovaries or testes, reproductive organs that contribute to many of the ...

Genetic conditions often result from inherited mutations passed down from one or both parents. In an inherited genetic disorder, a mutated gene is transmitted from a parent. 3 Recent developments have ...

From invisible wafts of diesel exhaust to sun-choking plumes of orange smoke, air pollution is known to damage respiratory well-being. Now, research suggests another reason to hold our breath: ...

A chromosome is a DNA molecule that contains genetic material. Sex chromosomes are chromosomes that affect your sexual anatomy and reproductive development. Most of us were raised with the idea that ...

New research has mapped the cell types that specialise to form reproductive organs in both sexes, identifying key genes and signals that drive this process. The findings offer important insights into ...

The vulva and the female external genitalia begins to develop while the baby is still within the mother’s womb. The development again gains acceleration during puberty when the female reproductive ...

An endocrinologist is a doctor who specializes in the endocrine system. This network of glands inside your body creates hormones that help cells talk to each other. The endocrine system is varied and ...

Climate change is rightly cited as an environmental crisis that could lead to human extinction. Yet there is another pollution issue, indirectly related, that could make it literally impossible for ...

Assisted reproductive technologies are medical procedures that help people experiencing difficulty having or an inability to have biological children of their own. From in vitro fertilization to ...