Goat Pregnancy: Fetal Development from Conception to Birth

The gestation period for a goat (doe) averages **150 days (≈5 months)**. Here's how the kid develops in utero:

First Trimester (Days 1–50): Organogenesis

• Rapid cell division → embryo formation.
• **Day 21–25:** Heartbeat detectable via ultrasound.
• **Day 30:** Major organs (brain, liver, kidneys) forming; limb buds appear.
• **Day 45:** Embryo ~1 inch; recognizable as a goat; sex organs differentiating.

Second Trimester (Days 51–100): Growth & Refinement

• **Day 60:** Fetus ~3 inches; hair follicles forming; hooves & horn buds visible.
• **Day 80:** Fetus ~6–8 inches; covered in fine hair; active movement (kicking).
• **Day 100:** Fetus ~12 inches; well-proportioned; bones hardening.

Third Trimester (Days 101–150): Maturation & Preparation

• Rapid weight gain (most birth weight added in last 6 weeks).
• Lungs mature (surfactant production for breathing).
• Kidneys produce urine into amniotic fluid.
• **Day 140+:** Fetus ~18–20 inches, 5–7 lbs; positioned for birth (front feet + head first).
• Colostrum forms in udder; doe "bags up"; ligaments relax.

Labor & Delivery (Parturition)

• **Stage 1 (1–12 hrs):** Restlessness, pawing, vocalizing; cervical dilation.
• **Stage 2 (30 min – 2 hrs):** Active pushing; water bag breaks; kid delivered (usually front feet + nose first).
• **Stage 3 (minutes–hrs):** Placenta expelled (doe often eats it).

Immediate Postpartum

Kid stands within 30–60 mins; nurses colostrum (critical for immunity) within 1–2 hrs. Bonding, drying, navel dip (iodine) follow.