My first question, which teen pregnancy mod are you trying to use, and have you removed all other teen pregnancy mods? They are all incompatible; there can only be one (I think that's a quote from some movie). I was a long time user of Inteen, but haven't looked back since I started looking at CH's work.
Wild Child, IIRC, is built upon CH's pregnancy controller. CH's controller was built loosely on Inteen, with many fewer conflicts. There is another teen pregnancy mod out there, or was anyway, but it required some payment for access to download. I did try it for a minute and tossed it aside.
I did briefly use CH's pregnancy controller as a stand alone mod, but tossed it in favor of the T&A pack (the family version Angels and Nurses would work just as well I believe).
Inteen: I was a long time user and tester for Inteen. Clunky implementation, and since Jase and MadCat left with there knowledge, extremely difficult to fix bugs or make minor modifications to improve it. But if you can get it installed, all the conflicts with other mods worked out, and overlook the fact the teens temporarily age to adult and back again, it works nicely.
Wild Child: I never used it. I'm not even clear what the intent of it was as it was trying to do everything Inteen and CH's mod did, but "better".
CH's Pregnancy Controller: Avoid the headaches and confusion with CH's mod. Check to see if the windup clock in Electronics/Small Electronics has been modded to include the option to Turn Inteen On/Off. It should read to turn it off. And that Inteen is CH's version using his pregnancy controller, not Jase's Inteen. Make sure your teens aren't using the Gothic Double Bed, it wasn't coded right to allow TFB. Custom beds are a crap shoot. Most allow TFB, but I'd guess some don't. Don't worry about pregnancy clothes or Squinge's mod. CH includes the pregnancy morph for the teens, and I think one default dress in different colors. You only need Squinge's mod is you want to use other pregnancy outfits.
ACR shouldn't have any affect on teen-teen woohoo or TFB. It does allow teen-adult interaction though. The real plus for ACR is all romantic interaction is automated, to include TFBs, so you can have a pleasant, or not so pleasant, surprise.