No 'Try for Baby' option in Sims 4

Are you sure she is not already pregnant?

How many are there in the household? There is a max of 8 sims.

If either of the above is true there will not be an option to try for baby. The same holds true if there is another Sim that is pregnant and that will result in the total reaching 8. (Note that a sim can have triplets).

If it isn't one of the above fixes, maybe it's a custom content related action. This happened to me before and it was just a mod conflicting with the option. If you have mods, try emptying the folder and then seeing if your game works. Put it back in batches to determine which cc is broken. 

Did you get the house from the gallery? I got a house from the gallery and it had cc but I do not own any cc or mods. Of course, as you would know this is making the game bug out a bit. I also don't have that option but the bed is cc. I know you said you don't have any cc but again I also don't own any cc as well but this still is happening to me. The sadly is the only thing I can think of but this is from April so it's probably already figured out.

I have had this before except my sims can woohoo but when i click the try for a baby option, it gets declined! Keep in mind they can go in the room and both get into the bed because they can woohoo. Please can someone help me. Thanks.

Have you reached the maximum members in a household (8)? this number includes Sims, Pets and any current pregnancies. Remember there is a chance to have triplets.

I know this thread is a year old, but I've just encountered this.  I have a Sim couple that I've played for quite a long time, and they've been married almost that whole time.  When I look at all the romantic options, they have Woohoo available, but not Try for Baby.  I've removed all my mods, but I still see this.  The family has two kittens (not cats, kittens), so no pregnancies there, and no other members in their family.  They are both Young Adults, and both have 90+ days before aging to Adult.  (I had aging turned off before.  I turned it on figuring that might be the problem.)

I checked under custom gender (in Full Edit CAS), but both have the normal options selected.  Both relationship bars (romantic and friendship) have been maxed out for a very long time, so it isn't a relationship issue.

Does anyone know of anything else that could cause this, or that I can use to fix it?  I may end up using a mod to make her pregnant, but that isn't how I want to do it.

Thanks in advance for any advice that anyone can give.

Please remove all Mods and CC then try again.

Apart from the above this also happens in two cases. If she is already pregnant or if she is an elder.

I already said that I removed my mods folder.  And she's neither pregnant nor an elder; that was also stated.  To reiterate: She's a YA with 90+ days before turning into Adult. She and her husband did Woohoo when they were first married, but it has been over 30 game days since then (I had aging turned off), and definitely nothing since then.  There are two kittens in the household besides her and her husband, and since they are KITTENS, there is no pregnancy there either. 

I know that when this has happened before, at least for a couple of people it was bad CC.  Other situations the players never stated whether they got it resolved or not, so we don't know.  But I removed my mods folder, then resaved the game and tried again.  They are standing next to a double bed; when I click on the bed itself, I get the Woohoo option but not Try for Baby.

The game is behaving as though either neither one of them has the "can impregnate" flag, or neither one has the "can be impregnated" flag.  No idea why, since when I checked to see if either got inadvertently set to custom gender, both were set default.

I may try playing another random family in the game and see if I can get the option for them.  At least that will tell me if the problem is with those two Sims, or if it's within the game itself.