Goat Pregnancy Timeline: Week-by-Week Guide

Goat gestation averages 150 days (roughly 5 months), with a normal range of 145 to 155 days. Knowing what is happening at each stage helps you provide the right nutrition, schedule health interventions at the right time, and prepare for kidding without surprises.

Quick Reference

Early Pregnancy (Days 0 to 45)

What is happening

After breeding, the fertilized egg travels to the uterus and implants around day 18 to 22. The embryo is tiny — smaller than a pea at day 25. All major organs begin forming. By day 30, the embryo has a heartbeat visible on ultrasound. By day 45, the fetus is about the size of a mouse and looks recognizably goat-shaped.

Management

• Confirm pregnancy: Ultrasound can confirm pregnancy at 25 to 30 days. Blood test (BioPRYN) at 30+ days. Or simply wait and watch for the doe to not return to heat at 18 to 21 days post-breeding.
• Nutrition: No changes needed. Feed as normal — the embryo's nutritional demand is negligible at this stage.
• Avoid stress: The first 30 days are the highest-risk period for embryonic loss. Minimize transport, herd changes, and handling.
• No vaccinations: Avoid Valbazen (albendazole) dewormer — it causes birth defects in early pregnancy. Other dewormers are generally considered safe but consult your vet.

Mid Pregnancy (Days 45 to 100)

What is happening

The fetus grows from mouse-size to about the size of a small cat. All organ systems are developing and maturing. Bones are hardening. The doe may begin to show a wider belly by day 90 to 100, especially if carrying multiples. Single kids may not be visible until later.

Management

• Nutrition: Still no major changes for most does. Good quality hay or pasture free-choice. Does in good body condition (BCS 3.0 to 3.5) do not need grain supplementation yet.
• Ultrasound for kid count: If you want to know how many kids the doe is carrying, day 40 to 50 is the best window for counting. After day 60, fetuses overlap on ultrasound and counting becomes unreliable.
• Routine health care: Continue normal FAMACHA checks and hoof trimming. This is a good time for hoof trimming since the doe is not yet heavy with kids.
• Body condition monitoring: BCS monthly. Does should maintain 3.0 to 3.5. Thin does need supplementation now — do not wait until late pregnancy.

Late Pregnancy (Days 100 to 135)

What is happening

This is when 70% of fetal growth occurs. The fetus goes from the size of a cat to a full-size kid ready for birth. Nutritional demand increases dramatically. The growing kids compress the doe's rumen, reducing her ability to eat large volumes at once.

Management

• Increase nutrition: Begin or increase grain supplementation — 0.5 to 1.5 lbs per day depending on body condition and number of kids. Feed smaller, more frequent grain meals since rumen space is reduced.
• Hay quality: Switch to the best hay you have. Alfalfa or alfalfa-grass mix provides more calories and calcium per pound than grass hay alone.
• CDT booster: Give CDT vaccine at day 105 to 120 (4 to 6 weeks before due date). This boosts antibodies that will pass to kids through colostrum.
• Selenium and Vitamin E: In deficient areas, give BoSe injection at day 120 to 130 (per your vet's protocol). This prevents white muscle disease in kids.
• Udder development: The udder starts filling. First fresheners may begin "bagging up" 2 to 4 weeks before kidding. Experienced does may not fill until the last few days.

Pre-Kidding (Days 135 to 150)

What is happening

The kids are fully developed and positioning for birth. The doe's body begins hormonal changes preparing for labor. Ligaments around the tail head soften. The udder reaches full fill.

Management

• Kidding supplies ready: By day 135, everything should be assembled and accessible. Towels, iodine, bulb syringe, feeding tube, colostrum backup, flashlight.
• Move to kidding area: Around day 140 to 145, move the doe to her kidding stall or pen so she is comfortable in the space before labor begins.
• Check ligaments daily: Feel the ligaments on either side of the tail head. When they become very soft or disappear completely (you can wrap your fingers around the tail head), kidding is 12 to 24 hours away.
• Watch for discharge: Loss of the mucus plug (amber or clear thick discharge) means labor is approaching — usually within 24 to 48 hours.
• Reduce grain slightly: Some producers reduce grain in the last 2 to 3 days before expected kidding to reduce the risk of milk fever and udder edema at freshening. Others maintain or increase. Follow your vet's or mentor's guidance.

Due Date Calculator

The standard calculation is breeding date plus 150 days. Here is a quick reference:

Remember that normal range is 145 to 155 days. Nigerian Dwarfs tend toward 145 to 148 days. Standard breeds tend toward 148 to 152 days. First fresheners sometimes go a few days longer. Does carrying singles may go a day or two longer than those with multiples.