It sounds like you're referring to assisted reproductive technologies involving egg donation and donor sperm. These options are commonly used in fertility treatments when one or both partners cannot use their own eggs or sperm to conceive. Here's an overview depending on your context:
Scenarios Involving Egg and Donor Sperm
1. Single Individuals or Same-Sex Couples:
A single woman or a lesbian couple may use a donor sperm and either their own or a donor egg.
A single man or gay couple typically needs both an egg donor and a surrogate, plus donor sperm (if not using one partner’s sperm).
2. Heterosexual Couples with Fertility Challenges:
If both partners have fertility issues (e.g., poor egg and sperm quality), they may use donor eggs and donor sperm—creating an embryo via IVF.
3. Donor Embryos (Double Donation):
Some clinics offer donor embryos, which are created using donor eggs and donor sperm—sometimes from previous IVF cycles where donors had extra embryos.
