sex imbalance

Strangely, the village did not produce a boy in Poland for nine consecutive years
In a small border village in southern Poland, the government is proposing to reward the first family to have a son after 9 years of giving birth to a girl.
Decoding shrimp phenomenon
Microbiologists of the University of Portsmouth (UK) discovered that paramyxean parasites are the culprits that make males turn into females.