Parodied: Alice gets raped by Bob. The latter gets pregnant.
Zig Zagged: Alice goes to the hospital and gets the rape kit and morning-after pill. But the M.A.P. doesn't work, and she gets pregnant anyway. So she gets an abortion.
Alice does not become pregnant as the result of the rape.
Alice and Bob had loving, consensual sex and the child is the product of that.
Enforced: "We need to create some drama, and give this new character a dramatic backstory."
Lampshaded: "I know he was conceived in rape, but Charles is still my son."
Invoked: Bob keeps track of his victims' menstrual cycles so he can impregnate them.
Bob doesn't want to leave any "evidence" behind or have that "evidence" come back to haunt him later...so he uses a condom.
Alice finds out she is pregnant, and gets an abortion.
Knowing that vaginal rape may make Alice pregnant, Bob rapes her anally and/or orally instead.
Conversed: "This show makes no sense. Alice has been raped and is now pregnant because of that. Her otherwise situation is also really awful, yet she chooses not to abort, even though everything up to this point has indicated that she could have had an abortion and that she isn't morally opposed to it."
Implied: Alice gets raped. Nine months later, she abandons a newborn baby by putting it in a container.
Now Alice has inside of her yet another reminder of what happened. She might carry some resent towards it, therefore. (And in TV-Trope Land, she wouldn't abort it because Good Girls Avoid Abortion. If she does choose to have an abortion in this setting, everyone will know and will behave as though she crossed the Moral Event Horizon as much as or even more than they would towards her rapist(s).) And the child is considered "bad" because his/her biological father did something bad.
Alice chooses to give birth to the child, Charles. However, in Alice's country, Bob (Alice's rapist) can claim custody to Charles (even though it's known that Bob raped Alice), and chooses to do so. Alice is thus forced to interact with Bob frequently, which constantly reminds her of the attack. Alice's psychiatric problems caused by the attack are worsened, and recovery becomes impossible as long as he's around.
When Alice's child Charles is 15, he accidentally finds out how he was conceived. He becomes broken, feels that he should never have existed and is just a painful burden for his mother, not to mention a reminder of what Alice has gone through. Eventually, he attempts suicide.
Alice gets counseling to help her through this, and she has loving family and friends who support her no matter what she decides to do. The child is not treated resentfully, by Alice or anyone else if Alice decides to carry to term.
Seeing Alice's situation, Dina becomes an activist that works for passing a law that denies rapists custody of children conceived in rape. She gains many followers, and they get the law passed in the end.
Charles's suicide attempt fails, and Alice's genuine love for him allows him to accept his origin, and think of himself as not a product of rape, but Alice's beloved son.
Played For Laughs:
The baby has slimy squid-like tentacles, and has an overall Ugly Cute vibe to it.
Alice's rape was Black Comedy Rape. The father of the child is allowed the parental rights to Alice's child, but he flees when he realizes that he has to pay child support (much to Alice's relief).
Played For Drama:
As the father of Alice's child, Bob can claim custody, even when it's known that Bob raped Alice. Alice hasn't reported the rape yet, and Bob offers to relinquish his parental rights if Alice doesn't report the rape. Alice must choose between protecting herself and her child from ever having to see Bob again, or reporting Bob with the hope of protecting the rest of society from him.
Alice doesn't really want to carry the child to term, but she remembers that she was a child by rape herself and wants to give her child a chance at life because she was given that much as well.