<prompt> Abruptio placentae occurs in all except:SmokersAlcoholicsPETFolic acid deficiency  <response>: Abruptio placenta is premature separation of normally situated placentaQ resulting in hemorrhage.Risk factors:Increased maternal age - Increased parityPre eclampsia - Chronic hypertensionPreterm ruptured membranes pregnancy - Sudden uterine decompression as in hydramnios and twinCigarette smoking - ThrombophiliaCocaine abuse - Previous abruptionExternal trauma - Folic acid deficiencyUterine leiomyomaMy My- I pity all of you out there as you have to memorise so many lists not only in gynae, obs but in other subjects as well. Even I have gone through the same phase. Friends I had devised a simple method to learn these lists. For some lists, I used to draw diagrams and then at the time of exam that diagram was reproduced in my mind. Try it out for yourself. e.g. 