Sort of a follow up:
[What change in human biology would lead to wild gestational periods?](https://worldbuilding.stackexchange.com/questions/165967/what-change-in-human-biology-would-lead-to-wild-gestational-periods)

In an alternate world during the middle ages, women are regularly with child for more than a year, with the most extreme verified case being more than three. The "average pregnancy" lasts, about nine months, but comes with a "plus or minus six months" qualification. Because of gestational periods being more unpredictable, it becomes essentially impossible to determine when any given child will be born. Standard deviations are quite large, with any one individual having multiple several pregnancies with various gestational times. This has no overall effect on the child itself. This has led to many families having children born far apart from each other. Children are at the same developmental level regardless of when they are born.

I would imagine that this would effect aspects of the family dynamic, specifically in terms of sibling bonding, physical development, and social cognition. This could be very impact for society as a whole, including for women in the workplace. What would be the ramifications of this biological change that people would have to deal with during this time period?