This isn't about children, many countries or a least parts of countries have mandatory vaccinations for children.

"Ontario and New Brunswick require immunization for diphtheria, tetanus, polio, measles, mumps, and rubella immunization, while Manitoba requires a measles vaccination."

And you can turn this around, many of those who try to force women fo give birth are against mandatory vaccinations.

Guess what has a longer and deeper effects? A 30second jab or raising a child? BTW many of the anti abortion activists don't care about children after they were born. Free education, healthcare, school lunch? Not on their watch.