What is the main difference between oogenesis andspermatogenesis in terms of meiosis?

Oogenesis does not include a second meiotic division.

Oogenesis produces three polar bodies, whilespermatogenesis produces only one.

Oogenesis takes place in the uterus, whilespermatogenesis takes place in gonadal tissue.

The number of functional gametes produced is different.

Before birth Infancy and childhood (Ovary functionally inactive) Meiotic events 20 Oogonium (stem cell) Mitosis- 20 Primary oocyte Primary oocyte (arrested in prophase I; present at birth) Each month from puberty to menopause Primary oocyte (still arrested in prophase I) Spindle- Meiosis I (completed by- one primary oocyte each month in response to LH surge) First polar body Meiosis II of polar body- (may or may not occur) Secondary cocyte (arrested in metaphase II) - Ovulation Sperm Meiosis II completed (only if sperm Polar bodies (all polar bodies penetrates oocyte) degenerate) Second polar body Ovum