What if people lost the ability to have children when they reached age thirty ?

My parents were older than usual, and they were never able to keep up with me . They griped and complained whenever I wanted to go to the movies or another town, and that was a difficult experience for me . Men have the ability to father children in their sixties and seventies . Tony Randall fathered a child in his eighties . A woman usually loses the ability to have children in her forties or fifties, although there have been exceptions . NOW -- What if EVERYBODY lost the ability to have children to where it was impossible to conceive a baby after age thirty . You wouldn’t have as much jealousy as you have now ( “Women have to be in a hurry to have children, and men get to take all the time they want !” ) . How else would our society be different ? What would it be like if everybody knew they had to get married and have children before they reached thirty ? Thank you in advance for your answers .