It is only in the modern world, that pampered people think that being pregnant is somehow going to marginalize their ability to work.
If there is no birth control, as a result of a lack of any tech required to provide it, you'll be a farmer.
Why? Because... crop yields will be pitiful, pesticides will be non-existant, there won't be tractors, and ... let's face it, the modern woman will be in far better shape than she traditionally is. And of course, the same goes for the male of the species.
There's a vast difference between 10 hour, 6 day a week, solid days of physical activity -- every single day, and a workout that people might have occassionally in our modern society. No one, and I repeat no one, works like our ancestors did.
Just imagine every single job, from washing clothes, to building houses, all without any form of mechanized aid.
So, as a farmer, neither you or anyone else will be taking it easy. You'll be in the best shape you can be, under whatever circumstances you're living in.
You'll be working until the day you give birth. And, you'll be back on your feet a few days after the pregnancy, and working again. And frankly?
There's zero reason to not be on your feet the next day.
Pregnancy is *normal*, a woman's body is designed to be pregnant 9 months of the year. It doesn't put any strain on the body. It's not difficult. It's *NORMAL*.
So, get used to it. You'll be popping out kids... and working at the same time. And guess what? Your husband will be working his ass off as well. You *both* will be. You'll both be working your asses off, and you'll see your feeble efforts as insufficient, while watching 1/2 your children, or more, die.
People don't realise how dangerous the world was. How dangerous it still is. I recall reading a news story, in the 20s, of someone having their arm broken in a construction accident.
It got infected, sulfa didn't help him, and that was that. Something that, tragically, a few years later wouldn't even been considered a problem.
Modern knowledge won't help without antibiotics, vaccines, you name it. It sure as hell won't help without cirtrus fruit, or vitamins (that are required when you can't grow all the foods you eat now). Your kids are going to die.
They'll die from a *scratch*. They'll die from premature child birth, from something that an ultrasound could see and that could be fixed, because of malnutrition and disease and wolves and falling down. They'll die from the simpliest of flus, and from colds. They'll die from food poisoning.
So, quite frankly? You'll do it. Period.
Just like any other type of work, you'll do it. Just like men will. Like everyone will. Whatever is required, for the community to survive and thrive, you'll do it, he'll do it, we'll all do it.
Or, be marginalised and seen for what you are.
A selfish, childish, leech on society.
After all, your first thought was "I don't want to...". Not, "We'd better all pull together!", or "I need to help!"...
Do you think men will want to return to the days, where they had to do their part to provide for 8 kids. And grandma and grandpa?
Nope.. but, they'll do it too.