Pronuclear (adjective)

Relating to the nucleus of an egg cell or sperm cell before fertilization.

Origin:

Derived from the latin word 'pro-', which means 'before', and the word 'nucleus', which means 'center'.

Examples:

1. The pronuclear stage is a crucial point in the development of an embryo.
2. Pronuclear transfer is a technique used in assisted reproduction to help prevent certain genetic disorders.
3. During fertilization, the pronuclear stage is when the sperm and egg nuclei begin to fuse.
4. Pronuclear imaging is a diagnostic tool used to evaluate the quality of eggs before fertilization.
5. In the pronuclear stage, the genetic material of the sperm and egg is kept separate in order to ensure that the resulting embryo will be genetically diverse.