Birth of Louise Joy Brown, the first human to have been born after conception by in vitro fertilisation, or IVF.

Louise Joy Brown is an English woman noted as the first human born following conception by in vitro fertilisation (IVF). Her birth, following a procedure pioneered in Britain, has been lauded among "the most remarkable medical breakthroughs of the 20th century".

In vitro fertilisation (IVF) is a process of fertilisation in which an egg is combined with sperm in vitro. The process involves monitoring and stimulating the ovulatory process, then removing an ovum or ova from the ovaries and enabling sperm to fertilise them in a culture medium in a laboratory. After a fertilised egg (zygote) undergoes embryo culture for 2–6 days, it is transferred by catheter into the uterus, with the intention of establishing a successful pregnancy.

July 25 is the 206th day of the year in the Gregorian calendar; 159 days remain until the end of the year.