No Results After 16 Weeks of Using Latisse?

I have used latisse for exactly 16 weeks but there are barely any results, i see no difference to my thin short eyelashes. My mother-in-law and i started at the same time and her eyelashes are HUGE, thick, and dramatic. why didn't we get the same results? I also forgot to use it a couple of nights last month and almost a week in a row the month before. Could missing my dose affected the growing process?