What is the fine-grained topic of the following text: The findings, published in the journal Human Reproduction, showed that soy formula-fed babies were 40 per cent more likely to have used hormonal contraception at some point in their adulthood to alleviate menstrual pain compared to women who had not been fed soy formula as babies. Only return the topic.
The influence of soy formula feeding in babies on the use of hormonal contraception in adulthood for menstrual pain relief.