What is several inches long , purple , and makes ladies scream ? SIDS
This is a very taboo subject that people don't talk about in public.  Why did you choose to make a joke about it?
It's basically saying women are bitches.
The loss of a child is extremely traumatic to anyone, man or woman alike, and it could even have happened to people who hear your joke.  You wouldn't want to subject someone to that kind of anguish, I hope.