I see a lot of confusion here.
The population reduction in Bangladesh occurred due to a number of reasons.
1. Education of women at primary and secondary levels
which was helped by "send your girl child to school and get a sack of rice at the end of the month".
2.
There were already more girl children than boys in school at the end of the program some thirty years ago (mid 1980's) under Khaleda Zia's rule.
3. Women got educated and got jobs in the 1990s onward. They were less interested in having babies and slaving in a household under "Mother in Law".
4. Unlike Pakistan - there is no social stigma in women pursuing a career in an apparel factory, women have their hostels in which they live together and worked. Or some did from city slums.
5. When they decided to start a family,
their education helps in controlling the number of offspring which means fewer babies get a better childhood with better health and education.
6. Their children are now educated and have become business owners and low level govt. servants with a university education. An entire section of society was uplifted from poverty.
The formula is simple - let your women work and produce something of value to be exported overseas to earn some foreign exchange. Let 50% of your workforce contribute to your economy by earning an income.
This movement of liberation and education of women has been replicated in Bangladesh many times over. Destitute bright women with less than financially ideal backgrounds cannot be left behind as rejects of society. They must be given a chance to contribute and add value socially and most importantly - ECONOMICALLY. This is the problem that plagues Muslim countries and must be corrected. Blind conservatism is keeping many Muslim countries backward - we must find creative ways to solve this problem our enemies take advantage of.
Asian University for Women in Bangladesh took in some 5000 destitute Afghan women when the Taliban prohibited women's education there beyond 5th grade. There were quite a few applicants from Pakistan as well. They do not pay one cent for their University education and stay on campus free of cost.
AUW have women studying there from scores of Asian countries. But all come from poor but academically superior backgrounds.