Experts agree there is no clear-cut reason why it seems like it’s easier to potty train girls vs boys, but there is plenty of speculation. Dr. Kogan suggests developmental differences — like with so many other milestones, boys tend to develop a little later than girls. Dr. Brown suggests that it may have to do with hygiene and that girls typically are more interested in being cleaner and drier than boys.
However, Dr. Frank notes that, while on average boys do begin potty training a little later than girls (average age for boys is 30 months for girls is 28 months), the length of potty training time is the same for both boys and girls.