I wasn't riding at the time I had my kids, but pregnancy and birth didn't change anything I did. For one, I was out walking in hip dip snow the day or week before (I don't remember anymore exacty); the other the day before I was splitting wood and the day after I was out and about doing my normal routines -- shoveling snow, downhill skiing, piling wood, bush work, whatever. The only change was there wasn't as much time anymore! Especially as they got older! LOL
For me, if I *had* been riding at the time, I would have been on the horse the next day.