Mothers who smoke while they are pregnant or breast feeding may be damaging the future fertility of their sons, according to a new study performed on mice.
A new study reported that daughters spent double the amount of time than sons when it comes to caring for aging parents.
When mother mice involve socially for mates in a rather promiscuous environment, they give birth to more active sons, study proves. Their sons play hard till they live but die young. Their sexier smell is the reason of their shorter lives.