So my boyfriend and I are having a debate on the process in making a baby and the development of said child during the pregnancy. He says that he is putting in 50% of the process just because he has the sperm that has "information for the baby" but I say he only has a portion of the development because my body becomes a home and actually has the sperm develop into a baby for 9 long months giving up my nutrition to the baby during the pregnancy ect..

Who's right?