In surrogacy, the woman in whose uterus the couple's embryo is implanted is called the:

1. Surrogacy helps women who cannot implant an embryo in their own uterus. 2. The couple's oocyte is fertilized in vitro with the husband's sperm. 3. The resulting embryo is implanted in another woman with a normal uterus, the surrogate mother. 4. Sperm or semen donor and foster nurse do not carry the pregnancy, so those are ruled out. _Source: Balbharati (Maharashtra Board) Class 10 Science & Technology Part 2, Ch 3 "Life Processes in Living Organisms Part 2", p.41_