If you subscribe to the “rule of seven,” the question of where the boundaries of a socially acceptable relationship lie arent a matter of opinion—theyre clearly defined. According to the rule, the age of the younger partner (regardless of gender) should be no less than seven more than half the older partners age.

Whats the best age gap for second child?

Possible benefits of a 2-year age gap Experts recommend waiting at least 18 months between pregnancies because it reduces the risk of your youngest child being preterm or low birthweight (especially if youre over 35).