<prompt> Embryonic period of development is -Upto 16 weeksUpto 12 weeksUpto 10 weeksUpto 8 weeks  <response>: Ans. is d i.e., Upto 8 weeks o The embryonic period of development extends from the 4th to 8th week of gestation and is also called the period of organogenesis.3 phases of development1. Pre-embryo phase germinal phase - day 0 to week 32. Embryo phase - weeks 4-83. Foetal phase - weeks 8-38o Pre-embryo phase divided into,1. Ovulation2 Fertilization and implantationStage of bilaminar germ disc 2nd weekStage of trilaminar germ disc 3rd week 