In an Effort to Become Pregnant After Many Years of Trying,more

In an effort to become pregnant after many years of trying,more and more couples are turning to ________,which involves the removal of mature eggs from a female's ovary and fertilizing them with sperm in a laboratory before surgically implanting them in the woman's uterus.

A) gamete intrafallopian transfer (GIFT)
B) embryo transplant
C) zygote intrafallopian transfer (ZIFT)
D) in vitro fertilization (IVF)