Bangladesh had a TFR of 6.6 in then East Pakistan is 1960! It has decreased to 2.1 today.

Wanna know how that happened?
A thread below:- https://twitter.com/porbotialora/status/1297424619138244609

In 1978, the Bangladeshi government started to promote family-planning services through family-welfare assistants, most of whom were professionally trained paramedics, nurses and birth attendants. Their job was to reach out to village women at the grassroots level.....

The point was to advise mothers about the benefits of having a small family, but they also offered comprehensive advice on other things and helped families to get access to competent health care.

It is noteworthy that religion was not a major obstacle to promoting....

Birth control in Bangladesh. Our recent history probably played a role. In the liberation war of 1971, many women were raped, and some became pregnant. They did not want the babies of the oppressors, so they needed abortions. Even though our country is predominantly Muslim....

And has a rather conservative culture, people sympathised with the pregnant rape victims. The humanitarian catastrophe actually provided an opportunity to take a progressive approach to family planning.

Lastly, female empowerment in Bangladesh also played a great role....

Unlike our neighboring countries, Bangladesh doesn’t have as much of a stigma for women to persue education and jobs. The female literacy rate of Bangladeshi Females (Age 15 and above) is 71.18%. (Data from 2018)

Females get work here a lot too.

All of these factors meant that the females didn’t prefer having large amounts of babies anymore, regardless of religion. However, it is to be noted that Bangladeshi rural areas still have relatively high TRF due to lack of education and generally people being more conservative.