Africans were also used in large numbers for slavery because they were easier to buy. During the beginning of the Atlantic Slave Trade, Africans were willing to sell other Africans as slaves to Europeans because they had their own system of slavery.
You could have sex towards the end of your bleeding and then actually conceive 4 or 5 days later with your early ovulation. The probabilities of getting pregnant while on your period are low, but the possibilities are there. This is not the time to have sex if you are trying to get pregnant.
Yes if you have unprotected sex then you can get pregnant any time of the month, though it is unlikely to happen unless you are ovulating it is not impossible. Ovulation occurs around 10-16 days before a period is due and is when a woman is most fertile, therefore most likely to get pregnant. Ovulation. If you don't want to get pregnant then get on some reliable contraception.