Why was Islam more successful than Christianity in acquiring converts?

because their is a high fertility rate than american women have.

Explanation:

While the world's population is projected to grow 32% in the coming decades, the number of Muslims is expected to increase by 70% - from 1.8 billion in 2015 to nearly 3 billion in 2060. In 2015, Muslims made up 24.1% of the global population. Forty-five years later, they are expected to make up more than three-in-ten of the world's people (31.1%). The main reasons for Islam's growth ultimately involve simple demographics. To begin with, Muslims have more children than members of the seven other major religious groups analyzed in the study. Muslim women have an average of 2.9 children, significantly above the next-highest group (Christians at 2.6) and the average of all non-Muslims (2.2). In all major regions where there is a sizable Muslim population, Muslim fertility exceeds non-Muslim fertility.