(generic) A nuclear family that is or was a First Family, when speaking non-specifically.

Someone that acts in a friendly manner towards one's family.

plural of family friend

(UK) A former type of social security payment made to families with children; now replaced by child benefit.

present participle of run in the family

Third-person singular simple present indicative form of run in the family

simple past tense of run in the family

A nuclear family with only one parent.

plural of single-parent family

Timing sexual intercourse to avoid the time of ovulation (if pregnancy is not wanted) or to fall within that time (if pregnancy is desired).