African elephant Gestation Period: How Long Is a African elephant Pregnant?

A african elephant is pregnant for about 645 days, roughly 21 months. Normal calving happens between 640 and 660 days, and a typical litter is 1 calf.

How long is a african elephant pregnant?

A african elephant carries her calf for an average of 645 days, or about 21 months. Counting from the breeding date, calving is normal anywhere from day 640 to day 660.

Key checkpoints across the 645-day african elephant gestation, measured in days from breeding:

African elephant gestation timeline from day 0 to day 645: day 60 Pregnancy detectable from faecal or urinary hormone monitoring; day 240 Ultrasound in managed care tracks calf growth and viability; day 480 Progesterone levels remain high; calf grows rapidly; day 630 Progesterone drops sharply — birth is normally within 2 to 5 days; day 645 Expected calving.

African elephant gestation stages, month by month

Months 1–6: early gestation

There is no visible change in a 3,000 kg animal carrying an embryo. Pregnancy is detected through hormone monitoring of faeces or urine, and in zoos by ultrasound. Wild pregnancies are usually only inferred much later from body shape and behaviour.

Months 7–14: mid gestation

The calf grows steadily and the cow's nutritional demand rises gradually. In managed care this is the window for training her to accept ultrasound and blood draws, foot care and any move between enclosures, well before she becomes uncomfortable.

Months 15–20: late gestation

Calf growth accelerates and the cow visibly broadens, with the mammary glands between the front legs beginning to fill. Energy and mineral intake rise, and in the wild the herd's movement patterns increasingly accommodate her pace.

Months 21–22: birth

Progesterone falls sharply two to five days before birth. The cow becomes restless, often separating slightly with one or two attendant females. Labour is comparatively fast, the calf is delivered standing, and the herd gathers noisily around it. The calf stands within an hour and nurses soon after.

Signs a african elephant is pregnant

Hormone monitoring of faeces or urine gives the earliest reliable confirmation
Ultrasound in managed care confirms and tracks the calf from mid gestation
Visible broadening of the abdomen in the final six months
Mammary glands between the front legs enlarge in the last weeks

Signs of approaching calving

A sharp drop in progesterone two to five days before birth
Restlessness, reduced feeding and attendant females staying close in the final hours
Contact your vet if labour stalls, if the animal strains without progress, or if there is abnormal discharge before calving begins.

What affects african elephant gestation length

At about 645 days — close to 22 months — the African elephant has the longest gestation of any land mammal.
Calves are born at roughly 100 to 120 kg and can stand within an hour, because a newborn that cannot keep up with a moving herd does not survive.
The long gestation supports extraordinary brain development: elephant calves are born with a brain around 35 percent of its adult size and a lifetime of social learning ahead.
The single most reliable birth predictor in managed care is the sharp fall in progesterone about two to five days beforehand — no visual sign comes close.
Females typically calve once every four to five years, and other females in the herd (allomothers) help raise and protect the calf.
African elephants have no fixed breeding season, but conception peaks in the wet season when body condition and food supply are best.

Estimate your african elephant's calving date

Enter the breeding date for an estimated calving date at 645 days.

Estimate a african elephant due date

Breeding date

Estimated calving date

Tuesday, 20 June 2028

Earliest

15 Jun 2028

Latest

5 Jul 2028

Open the full African elephant gestation calculator

African elephant pregnancy FAQs

How long is an African elephant pregnant?

About 645 days, or close to 22 months, with a normal range of roughly 640 to 660 days. It is the longest gestation of any land mammal.

Why is elephant gestation so long?

Because the calf must be born large and neurologically advanced. A 100 kg newborn that can stand within an hour and follow a moving herd the same day needs almost two years of development, and the brain continues that pattern of slow, social learning after birth.

How is an elephant pregnancy confirmed?

By measuring hormones in faeces or urine, and by ultrasound in zoos and sanctuaries where the cow is trained to cooperate. There is no external sign early on in an animal of that size.

How often does an African elephant give birth?

Roughly every four to five years. With a 22-month pregnancy and two or more years of nursing, this is one of the slowest reproductive rates of any mammal, which is a major reason poaching losses take decades to recover from.

How can keepers tell birth is close?

The definitive signal is a sharp fall in progesterone two to five days before delivery, measured from regular blood samples. Behaviour supports it — restlessness, going off feed, and attendant females crowding close — but the hormone drop is what birth watches are built around.

Do African and Asian elephants have the same gestation?

They are close but not identical. African elephants average around 645 days and Asian elephants around 630, so an Asian elephant calf typically arrives about two weeks sooner.

More gestation pages

Wild animal gestation chart