🔄EMBRYONIC DEVELOPMENT IN DAYS🔄
#notes #obg #embryonic #development
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🧩WEEK 1
👉Day 1 -Fertilization
👉Day 2 - Two Cell Stage
👉Day 3 - Morula
👉Day 4 - Early Blastocyst
👉Day 5 - Late Blastocyst
👉Day 6 -7 - Events during the first week: Fertilization to Implantation
🧩WEEK 2
👉Day 8 - Bilaminar Disc Forms
👉Day 9 - Trophoblast with Lacunae
👉Day 10 - 11- Embryo in Uterus 10-11days after ovulation
👉Day 12- Extraembryonic Mesoderm Develops
👉Day 13- Uteroplacetal Circulation begins
👉Day 14 - Embryonic Disc
🧩WEEK 3
👉Day 15 - Laterality Established
👉Day 16 - Gastrulation: Formation of Germ layers
👉Day 17 - Epiblast forms germ layers
👉Day 18- Trilaminar embryonic disc
👉Day 19 - CNS Induction
👉Day 20 - Neurulation: Neural folds elevate
👉Day 21 - Transverse section through somite region
🧩WEEK 4
👉Day 22 - Neural Tube closure begins
👉Day 23 - Neural Tube Zippers
👉Day 24 -25 - Villus formation continues in the placenta
👉Day 26 - Pharyngeal Arches present
👉Day 27 - Number of somites increases
👉Day 28 - Neurulation
completes
🧩WEEK 5
👉Day 29 - Arm and leg buds forms
👉Day 30 - Development of the face
👉Day 31 - Development of the Gut
👉Day 32 - Presence of embryo in the chorionic cavity
👉Day 33 - formation of the Umbilical Ring
👉Day 34 - Optic cup and lens placode
👉Day 35 Branchial Arches and clefts
🧩WEEK 6
👉Day 36 - Physiological Umbilical Hernia
👉Day 37 Developing Face
👉Day 38 - Muscle Development
👉Day 39 - Endodermal Derivatives
👉Day 40- Auricular Hillocks
👉Day 41 - Atrial Septum formation
👉Day 42 - Digit formation
🧩WEEK 7
👉Day 43 - Limb cartilages and digital rays
👉Day 44 - Developing face
👉Day 45 - Conotruncal and Ventricular Septa
👉Day 46 & 47 - External Genitalia
👉Day 48 - Facial prominence fused
👉Day 49 - Digits present eyelids forming
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