"Relating to or designating an organ, such as a pistil or an ovary, that functions in producing seeds after fertilization."
A minute structure in seed plants, containing the embryo sac and surrounded by the nucellus, that develops into a seed after fertilization.
Many forest tree species have multiple archegonia which, after fertilization produce a number of proembryos.
The professional medical institution replied that the development after fertilization is continuous.