Sex, there is a link between genetics and first time age

WE ARE complex beings: our behaviors reflect this complexity and they have a lot to say. For example, the age at which we have the first child is the result of different characteristics: education, background and socio-economic context, historical period in which we live, but also partly biology. Is it possible to quantify the contribution of each single aspect? Difficult, but there are those who have tried to do it recently for biology, in particular genetics, with regard to precisely allage of first child and first sexual intercourse.