Why do humans not have a more "animal" birth cycle?

[Soubriquet]

Sorry if that's worded correctly I just couldn't think of how to phrase it

I watch a lot of wildlife documentaries and you always see how the animals have their young, and then don't come back into season for the next litter until the young has been fully weaned and left home.

Orangutans for example won't have another baby until their infant is at least 7 years old so well beyond the weaning age.

Why do we not do this? Is it because humans take so long to reach adolescence?

It can't just be the breast feeding aspect of it because as soon as the baby is weaned and the feeds drop, the mother is fertile again and ready to have another if she so wishes.

But kangaroos have 3 vaginas and in an almost constant state of pregnancy.

Fuck that

I thought female cycles sync with the moon cycle (if we get enough moon light aka hunter gatherers) so that the fertile days are full moon days to allow lots of sex when you can see who you're shagging?
This could be nonsense

A queen naked mole rats is constantly pregnant thats her role she is just a big lump of nipples with teethnot something i fancy orangs can have babies 4 years apart not 7 but they can feed baby and child till child is 7

I read a study of fertility rates amongst indigenous tribes which had a helpful (for the purposes of the study) convention of keeping menstruating women in a specific hut. Women fell pregnant every 2 years and typically allowed toddlers to self-wean from breast feeding. They had on average 12 pregnancies during their lives although not all resulted in live births. Some of the women rarely visited the hut, they were either pregnant or had no periods due to breast feeding.

Why aren't we like kangaroos??! No birthing pain AND a free on board tummy bag to fill with crap like tissues/ sweets/ purse/keys etc when the baby is out! AND a bonus of no tummy rolls because the pouch will cover it up!

Imagine the pouch - fluff you'd gather

It may be because humans were more at risk of dying young (before being able to reproduce) due to all the diseases we were susceptible to before modern medicine, such as malaria, chickenpox, measles, asthma, smallpox, respiratory infections, TB, plague, septacaemia from various untreated cuts, childbirth (stillborn, puerperal fever, unable to deliver due to fetal position with resulting two deaths) and so on.

It wasn't unusual for some women to give birth to 16 children and only have 1 -2 survive to adulthood in the poorer areas, remembering that children as young as 14 could be called "adults". While a few adults were know to live to a good age, for most of the population 30 -35 was the cut off point.

I think we need to go back right to the beginning of human existence. Humans were originally a nomadic species and we would have lived in the savannas of east Africa. A lot of animals have breeding seasons because they can only raise their young at certain times of the year with any chance of success (food, weather etc) humans however are capable of raising children throughout the year if the food is available and since we were nomadic we could move to places with more food. Also when there is a lack of food women's periods would stop probably to protect her from getting pregnant and using resources she cannot spare.