Zig Zagged: Some are pressured to procreate, others are not.
Averted: Alice doesn't catch any flack for not having or wanting kids (or more kids.)
The author wants to continue his series, so he plans on having others pressure Alice into having a child, who will carry on the series in the near future.
Or, he wants to make a story where there are serious consequences in refusing to have children. In short, the author wants to scare single people straight.
Lampshaded: "You know, Alice, having a child is a wonderful thing, which is why you will have one."
"What? You don't want children? HOW DARE YOU, YOU SELFISH BITCH??!!! AREN'T YOU ASHAMED??"
Alice's mother, who wants grandkids, bribes and blackmails Alice's friends and neighbors into pressuring her to have kids.
Exploited: To have Bob to herself, Carla convinced Bob that she herself wants to bear children when Alice doesn't.
Defied: Alice decides she'll be childfree no matter what anyone else thinks.
Discussed: "I just don't think having children is for me. It's great that you have a purpose in your kids, but I don't think that's my calling."
Conversed: "Why does it even matter whether Alice wants kids or not?"
Alice is being pressured to do something very life-changing (and costly in terms of time, effort, and money) that she doesn't want to do.
Alice gives in to the pressure from her friends and family and has several children. Because she was pressured into it when she wasn't ready, Alice finds the children very burdensome and has trouble connecting with them, while her kids feel unloved and unwanted.
Alice learns not to let others tell her what to do (or not do) regarding reproduction. She shows the naysayers that she leads a happy and productive life even without children.
After discussing the issue with Bob, he decided to take care of the children most of the time, greatly lifting off parental burdens from Alice while she could go after her dreams.
Played For Laughs: "I don't want kids. Never have, never will." Gilligan Cut to Alice and Bob happily raising 10 kids.