… today was my day 13 scan my endo thickness came 8.6mm and blood flow till zone four rest all is good but doctor said because me uterine cavity looks slightly small she extended dose of estradiol to 12 mg added l arginine and called me again on day 17 but said she wont start progesterone and do it in next cycle what she means by ti? My uterine cavity has always been normal 62 by 34 mm and in hysteroscopy also it came normal what to do? Is 6 cm small uterus? Can it increase if esrogen is raised? Please help