The third trimester. The little bundle of joy is about to arrive, and you've accepted the fact that life is going to be different. You begin to communicate and figure out how to deal with the small issues that annoy you about the other person. You focus on the positive aspects of the man/woman you're dating.
For example, you sleep in separate bedrooms on the nights you know he drank a few too many Johnny Walkers and will snore louder than a lawn mower. Conversely, there are character flaws that are intolerable and can't be overlooked. She yells at you and humiliates you in public.
You try talking to him about your feelings, and he storms out of the room and doesn't call you for days. You find out that she cheated on you when she went skiing in Aspen. This is the make-it-or-break-it part of the pregnancy and determines the future of the relationship.
"Giving birth" to a real relationship is not easy, and unlike the inevitability of a baby, you may decide to break up. It can be a stressful, uncomfortable, bumpy road, just like going through the aches and pains of carrying a baby. Is it worth it? Absolutely. Everyone wants to find "the one." You just need to go through all three trimesters until you feel that first slap on the tush.