Basil C. Tarlatzis

Fertility, defined as the ability to achieve a pregnancy, declines gradually over the woman's lifespan. Although this decline seems to begin from the age of 30 years, it is more obvious between 35 and 40 and increases dramatically thereafte…

in three (10%) cases progesterone levels were within the normal range throughout the luteal phase; therefore the endometrial retardation could be due to an inadequate response of the endometrium to progesterone and oestradiol. Echography de…