So for in terms of maternal I mean again it depends on if there's any underlying pre-existing maternal conditions. (pregnancymagazine.com)
Fetal macrosomia can be caused by genetic factors as well as maternal conditions, such as obesity or diabetes. (mayoclinic.org)
However, studies conducted on a smaller scale in Finland and elsewhere in Scandinavia using long - term data sets and time - series analyses have found that more males are born in years with higher mean annual temperatures [7], [11], [14], which suggests that mean ambient temperature affects maternal condition and influences the SSR. (journals.plos.org)