In a female child at birth oocyte is in a stage of-
**Question:** In a female child at birth, oocyte is in a stage of-
A. Diplotene
B. Metaphase II
C. Prophase I
D. Antral phase
**Core Concept:** In human females, the oocyte (egg cell) undergoes meiosis, a type of cell division, to form gametes. These stages occur during the development from fetus to puberty.
**Why the Correct Answer is Right:** Oocytes are present in ovaries from birth, but the process of meiosis is initiated during puberty, leading to the formation of mature gametes (eggs and sperm) suitable for fertilization. At birth, oocytes are in the prophase I stage, which is the first stage of the first meiotic division.
**Why Each Wrong Option is Incorrect:**
A. Diplotene: This stage occurs after meiosis I and before meiosis II, which is not applicable at birth.
B. Metaphase II: Metaphase II is the stage immediately prior to fertilization and does not apply at birth.
C. Antral phase: The antral phase is a phase in the follicle development that occurs during puberty, not at birth.
**Clinical Pearl / High-Yield Fact:** Understanding the developmental stages of oocytes is crucial for understanding fertility, reproductive health, and the timing of assisted reproductive techniques like intrauterine insemination (IUI) and in vitro fertilization (IVF).
**Correct Answer:** C. Prophase I
In summary, an oocyte (egg cell) is in the prophase I stage at birth, marking the beginning of its development into a mature gamete suitable for fertilization during puberty.