The arrival of a baby is greeted with joy and delight by family and friends alike.
For the little one's parents, however, nothing will ever be the same again - especially their love life.
They can suffer a phenomenon labelled 'baby quake', which shakes up their relationship and often makes them shun intimacy.
Experts warn that new parents may stop having sex, which can taint their marriage and ultimately drive them apart.
Their study found almost two-thirds of new parents have a concern about their relationship which did not exist before.