Is that me you're on about DD? Being realistic, I was hunting 12 weeks after the 3rd degree tear, it was 3 weeks after I bought the horse (who turned out to be a green-as-grass 3yo from Ireland!) Second baby was a VB with lots of stitching up required afterwards. I looked after myself for a couple of weeks, lots of tea tree oil baths. Then I rode the TB I bought whilst pregnant, decided I didn't like him, rode a friend's old mare, and went out and bought a new horse. First baby was born by EmCS and I was riding at 5 weeks. I did feel like a floppy ragdoll though. I'd entered a county show, convinced I would be fine, but had to get a last minute stand in rider for that. I groomed - gutted he came 3rd, when I knew I could have done better. A second place would have qualified me for RIHS. After the CS I was out on hound exercise at 10 weeks and at the opening meet at 13 weeks.
I rode until about 28 weeks each time, but had a really huge horse (nearly 18hh,) and couldn't get off. I have got a photo of me at 34 weeks sitting on him, the day I sold him. Each time I was pregnant I enlisted the help of an enthusiastic young girl once I could no longer ride myself and kept the horse competing, with some success. I got pleasure out of keeping my horse going and teaching a young rider the ins and outs of competing (I took 2 different riders successfully to county shows, which they would not have been able to do before.)
The biggest thing to remember is that it is not a competition to get back on the horse asap, and it IS only a short time in the grand scheme of things. It all seems like a long time ago to me now that I couldn't ride due to bump. I now have the tricky job of trying to decide who takes the pony hunting - the 5 yo, the 2 yo, or if I take the 8yo helper and I go on my horse. Before long you'll have had your babies, and be window shopping for ponies that go nicely on a lead rein!