ATLAS OF DEVELOPMENTAL STAGES
 

Ovaries, Follicles, and Oocytes

Monkey - Ovary Overview
Monkey - Resting Follicle
Monkey - Early 10 Follicle
Monkey - Middle 10 Follicle
Monkey - Late 10 Follicle
Monkey - Antral Follicle Overview
Monkey - Antral Follicle Primary Oocyte
Monkey - Antral FollicleThecal Layers
Chicken Ovary
Frog Ovary - Overview
Frog Ovary - Oocyte
Honeybee Ovary
Grasshopper Ovary
Sea Star - Ovary
Ascaris - 1st Meiotic Metaphase
Ascaris - 2nd Meiotic Metaphase

Testes and Sperm

Rat Testis Overview
Rat Testis - Seminiferous Tubule - Cross- Section
Chicken Sperm
Frog Sperm
Human Sperm

Dendraster excentricus


Oocyte Zygote 2-Cell Stage
4-Cell Stage 8-Cell Stage 16-Cell Stage
Blastula Gastrula Larva

Chicken Embryos

Unincubated Embryo
15-18hrs. Stage
18 hr. Stage
24 hr. Stage
33 hr. Stage Overview
33 hr. Stage Anterior End
33 hr. Stage Posterior End
48 hr. Stage Overview
48 hr. Stage Anterior End
48hr. Stage Posterior End
48 hr. Stage - Injected
48 hr. Stage Anterior End - Injected
48 hr. Stage Sagittal Section
72 hr. Stage - Overview
72 hr. Stage Anterior End
72 hr. Stage Posterior End
72 hr. Stage Anterior End - Injected