<prompt> According to embryologist, embryo is termed till: PGI June 20088 weeks of fertilization10 weeks after LM PLast menstrual period10 weeks after ferti lization12 weeks after LMP  <response>: Ans: A 8 weeks of fertilization The embryo is defined as products of conception after fertilization to 8 weeks?. Thereafter 8 wk onward it is called a fetus.The Prenatal period: Dutta Obstetrics 6th41Ovular period or germinal period lasts for first 2 wks following ovulation, in spite of the fact that the ovum is fertilized, it is still designated as Ovum.Embryonic period in humans begins at fertilization 2nd week of gestation and continues until the end of the 10th-week gestation 8th week of development.The fetal period begins at the end of the 10th week of gestation 8th week of development ends in delivery. 