I know notice that many Nigerian ladies as well as their African counterpart add more weight after marriage. I did my research and concluded that there reasons and factors that causes that. Some which includes;

1. Child Bearing:

One of the reasons and the most likely reason why so many Nigerian ladies get out of shape after marriage is due to child bearing. By the time they start giving birth to children, the body secretes hormones that causes weight gain and it stores fat in their body and many of these fat can be very difficult to lose especially she had a baby at hand that she gives milk

2. Refusal to Lose that After Baby weight:

Another reason is that most Nigerian ladies do not mind to exercise to lose the weight they gained during pregnancy, they just live with it, even after the second and third child.

3. Too Much Food:

Many of these Nigerians ladies do not have a diet plan that helps them keep their shape instead they feed of excess starch foods. Most of them don't even know that food has a certain amount that you need to eat, and more could mean you are eating excess. Some prefer to eat this and that because it is sweet, aromatic and it is what hteand aromatic, and they don't take into account the amount of nutrients they are eating to eat yam, eba, amala, bread, meat pie, snacks all which contains high calories and makes them gain weight.

Read full article http://www.newsphases.com/2016/07/9-reasons-why-nigerian-ladies-gain-weight.html

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Enlightening enough

Thank heavens some people have no more excuses for pushing out lame stereotypes like "why do IBO girls always blow up after 2kids?", "why do EDO girls stay 10 years married without any weight gain" etc