Here is a real life story that happened during the Second World War.
During the war in late 1944, Germany placed parts of Holland under a severe food embargo. This resulted in a widespread famine in the areas. The famine affected the whole population.
Medical records of this period were researched many years later. The records of the men whose mothers were pregnant and carrying them in the womb during the famine were examined in detail.
The study of the group of men, who were now grown up adults, showed that they all had somethings in common – obesity and predisposition to heart diseases!
Did the environment of the period have anything to do with it ?
Researchers observed that the environment had created severe stress and anxiety in the pregnant mothers. That was the prominent cause of the current tendencies and predispositions which the men were prone to and observed years later.