My cousin aged 29 is undergoing ivf procedure. She was having low ovarian reserve and after 4 years and 3 failed iui doctor advised her for ivf My question is that since last one month her endometrial lining is varying between 6-7 mm and so doctor is not transferring embryo. She is under medication for improving lining but it does not have much effect. I want to ask is it safe if embryo transfer is done at 6-7 mm endometrial thickness? Is there any natural method of improving lining? Request doctors to kindly give clear and precise answers