Boys born to mothers who have polycystic ovary syndrome (PCOS) or who have higher levels of testosterone during the third trimester are more likely to be less physically active at age 7, according to research presented at the first Joint Congress between the European Society of Paediatric Endocrinology (ESPE) and the European Society of Endocrinology (ESE). Testosterone levels or PCOS in the mothers were not associated with physical activity in girls, but 7-year-old girls whose mothers had higher testosterone levels during pregnancy had lower muscle strength. The findings highlight the important role that maternal testosterone and PCOS may play in future development in boys and girls independently. 

Men with fertility issues have lower levels of phosphate in the blood than average, according to research presented at the first Joint Congress between the European Society of Paediatric Endocrinology (ESPE) and the European Society of Endocrinology (ESE). In addition, low phosphate concentrations in the blood were associated with reduced sperm motility in infertile men. The findings can help researchers improve the understanding of the biological factors involved in male reproductive health, which could lead to new fertility treatments.

Three-year-old boys are more likely to have a shorter anogenital distance when their mothers have high levels of phthalates in their urine, according to research presented at the first Joint Congress between the European Society of Paediatric Endocrinology (ESPE) and the European Society of Endocrinology (ESE). In girls, the direct exposure to phthalates was associated with a shorter anogenital distance. The findings highlight how exposure to environmental pollutants can cause alterations in genital measurements during the first three years of life, which may affect sexual development and fertility later in life.

Individuals taking steroid tablets for more than 3 months are over 6 times more likely to be diagnosed with adrenal insufficiency than those treated with non-steroidal anti-inflammatory drugs, according to research presented at the first Joint Congress between the European Society of Paediatric Endocrinology (ESPE) and the European Society of Endocrinology (ESE). In addition, they have a greater risk of being hospitalised for adrenal insufficiency, while long-term users of inhaled steroids have an increased risk of developing adrenal insufficiency but without any increase in the number of hospitalisations. The findings highlight the importance of using an appropriate substitute treatment, such as hydrocortisone, in order to prevent the onset of adrenal insufficiency.

Girls given antibiotics during their first year of life, especially in the first three months, are more likely to enter puberty at an earlier age, according to research presented at the first Joint Congress between the European Society of Paediatric Endocrinology (ESPE) and the European Society of Endocrinology (ESE). The likelihood of early puberty was also higher among those exposed to a greater variety of antibiotic classes. The findings highlight the importance of using these medicines in infants appropriately and how early-life drug exposure could shape future health outcomes.