Basics of Obgy.txt

? Male gametes are produced from? - Spermatocytes + Spermatogonia - Spermatids - Secondary spermatocytes ? The process of spermatogenesis lasts approximately? - 45 days - 55 days + 65 days - 75 days ? Spermatogenesis begins with 2n spermatogonia undergoing? - Meiosis I and II + Mitosis and meiosis -...

? Male gametes are produced from? - Spermatocytes + Spermatogonia - Spermatids - Secondary spermatocytes ? The process of spermatogenesis lasts approximately? - 45 days - 55 days + 65 days - 75 days ? Spermatogenesis begins with 2n spermatogonia undergoing? - Meiosis I and II + Mitosis and meiosis - Mitosis only - Differentiation ? Following meiosis I, how many 1n secondary spermatocytes are formed? - One + Two - Three - Four ? Secondary spermatocytes undergo meiosis II to produce? - Two 1n spermatids - Three 1n spermatids + Four 1n spermatids - Six 1n spermatids ? Spermatids differentiate into? + Mature sperm cells - Spermatogonia - Secondary spermatocytes - Primary spermatocytes ? The process of ova production from oogonia is known as? - Spermatogenesis + Oogenesis - Fertilization - Meiosis ? Fertilization occurs in how many main steps? + Three - Two - Four - Five ? The initial barrier surrounding the egg that sperm must penetrate is? + Corona Radiata - Zona Pellucida - Ovum membrane - Sperm head ? The second layer that the sperm must breach during fertilization is? - Corona Radiata + Zona Pellucida - Plasma membrane - Pronuclei ? Fusion of ovum and sperm results in the formation of? + Pronuclei - Zygote - Blastocyst - Morula ? At 20 weeks gestation, approximately how many oocytes are present? - 1 million - 2 million - 3 million + 6-7 million ? By the time of birth, how many oocytes remain? - 400,000 + 1 million - 2 million - 500,000 ? The number of oocytes at puberty is about? + 400,000 - 1 million - 2 million - 200,000 ? During menopause, roughly how many oocytes are left? + 400 - 1,000 - 10,000 - 100,000 ? Oocytes arrest in which stage during meiosis I? - Leptotene - Zygotene + Diplotene - Pachytene ? Sperm gain motility in which part of the epididymis? - Proximal + Distal - Medial - Anterior ? When do sperm become hypermotile? - In the testes - In the vas deferens + In the cervix - In the seminal vesicles ? Fertilization of the egg occurs on which day post ovulation? - Day 2 - Day 3 + Day 1 - Day 4 ? The first cleavage of the fertilized egg occurs on? - Day 1 + Day 2 - Day 3 - Day 4 ? The embryo reaches the four-cell stage by? - Day 1 - Day 2 + Day 3 - Day 4 ? The formation of the morula happens on? - Day 1 - Day 2 - Day 3 + Day 4 ? Blastocyst formation typically occurs between which days? - Days 1-2 - Days 2-3 - Days 3-4 + Days 5-6 ? Implantation occurs on which day post ovulation? - Day 5 - Day 4 + Day 6-7 - Day 8 ? Implantation typically occurs around which days of a normal menstrual cycle? - 18th-19th day + 20th-21st day - 22nd-23rd day - 24th-25th day ? The first stage of implantation is? - Adhesion - Penetration + Apposition - Invasion ? The stage of implantation where the embryo attaches to the uterine wall is? - Apposition + Adhesion - Penetration - Invasion ? The final stage of implantation is? - Apposition - Adhesion - Penetration + Invasion ? Completion of implantation is achieved by which day post-ovulation? - Day 7 - Day 8 + Day 11 - Day 12 ? The endometrium consists of how many main layers? + Three - Two - Four - Five ? Which layer of the endometrium facilitates placenta separation? - Superficial Compact Layer + Intermediate Spongy Layer - Thin Basal Layer - Decidua basalis ? The thin basal layer of the endometrium is found? + Beneath the spongy layer - Above the compact layer - Surrounding the ovum - Fusing with the placenta ? Post-implantation, decidua differentiates into how many types? - Two - Three + Four - Five ? The decidua basalis is located? - Around the ovum + Beneath the implantation site - Lining the uterine cavity - At the cervix ? Which decidua encloses the ovum? - Decidua basalis - Decidua parietalis + Decidua capsularis - Decidua spongy ? Which decidua lines the remainder of the uterine cavity? + Decidua parietalis - Decidua basalis - Decidua capsularis - Decidua spongy ? The Double Decidual Sac Sign is observed during? + Early intrauterine pregnancy - Late intrauterine pregnancy - Ectopic pregnancy - Postpartum period ? The embryonic stage spans from which week post-ovulation? - 1st to 4th week - 2nd to 5th week + 3rd to 8th week - 4th to 9th week ? The fetal stage begins from which week post-ovulation? - 5th week - 7th week + 9th week - 10th week