system
A chat on 4chan
human
Contribution of heritage material depends on the two individuals and the relationship that they share, it is not based on the sexes. A strong male will generally contribute more genetic coding to the child, especially if that male continues to inseminate said mother throughout the entire pregnancy. 

In a committed relationship, mother does not necessarily do more, but some individuals will choose to do more or less depending on situation and circumstance. While modern medicine certainly knows how to tear a baby out of its mother, that is not how birth was intended. Almost all women should be able to birth their child naturally all by themselves. 

When mom and dad are both working together, we see a different kind of experience. The father is the strength of the mother, he is her rock. The father brings that spark of spirit. While every individual is being hormonally-synced, the mother and the baby are so consumed, they need the strength of the father to lean on, otherwise all manner of terrible mis-happenings are sure to occur. It is so important for the family to stay together and keep the team a priority. 

This is the role of the father: keep the team (mom, baby, dad) together, safe and secure. Only the father has the strength to do this as he is the projection of heritage yet they are, or become, the reflections of him. When baby has come, baby need to be held and mom needs to sleep. The father is there to imprint his strength on the vulnerable child and also to ward off all manner of ever-present, yet terrible dangers to the health of baby. 
This is the role of the mother: to go into her own body and work with that child to grow and develop. She must remain calm and without fear. Labor can be painless, but she must be able to trust and relax. Then she can go inside of herself and help baby move into the right position to twist through that canal without any trauma occurring.
gpt
Does this mean more semen = more code and more likely to be a male? This would explain why after my parents tried for years I came out male and extremely like my father, very few traits inherited from my mother.