Maltese Pregnancy: Gestation, Litter Size, and the Singleton Risk in a Tiny Dam

A Maltese is pregnant for about 63 days from ovulation, or 58 to 72 days from a first mating. Her breed does not alter the length. What is particular to the Maltese is the litter: typically 2 to 4 puppies, averaging around 2 to 3, with singletons in about 10% of litters according to secondary breed data. A single puppy is the highest-risk pregnancy this breed has, because one puppy can grow oversized without littermates competing for space. This page gives the due date, the litter size, and the vet planning that a tiny dam needs.

Working out a Maltese due date from ovulation

The length of a dog's pregnancy depends on what you count from, not on the breed. The 63-day figure is counted from ovulation. A mating date gives a wider range, because mating and ovulation are days apart: sperm can survive in the bitch for several days (AKC: 3 to 7 days for healthy sperm), and the egg still needs 2 to 3 days after ovulation to mature before it can be fertilised (Cornell).

For a Maltese the ovulation date does double duty, because it also settles whether a dam at day 65 is overdue or simply carrying one puppy. Count 62 to 64 days from ovulation, about 63, or 64 to 66 days from the LH surge and first progesterone rise; the first day of diestrus gives 56 to 58 days, and a first mating gives 58 to 72 days (Merck, AKC, Cornell, UC Davis). The hub article on how long dogs are pregnant explains all four anchors and why the mating count is the one to distrust.

Cornell gives the mating-counted figure as 63 days plus or minus 7 as well. Progesterone testing identifies the ovulation day, and the due date narrows to 63 days plus or minus 1 to 2 days (Cornell). That precision is worth having for a Maltese, because a singleton pregnancy can run slightly longer than average: smaller litters tend to run a day or two longer, and the vet needs to know whether a dam at day 65 is overdue or simply carrying one puppy. The difference between those two judgements is the ovulation date.

Worked example: a Maltese due date

Suppose a Maltese is mated on Sunday 19 April 2026. Counting from that mating date:

Put that mating date into the calculator on the homepage and you will see the same window. If progesterone testing identified the ovulation day, enter that instead: the window narrows a great deal. The calculator gives an estimate, not a diagnosis, and it does not replace veterinary care.

How many puppies do Maltese have?

A Maltese typically has 2 to 4 puppies, averaging around 2 to 3. Breed data puts the average at 3.5 in a range of 2 to 6, with singletons in about 10% of litters (BreedTracker, secondary), while a Norwegian School of Veterinary Science study of 9 Maltese litters found an average of 2.1 puppies, in a range of 1 to 4. The Norwegian sample is small, only 9 litters, so treat its average as indicative rather than precise; the two sources agree on the shape of the picture, which is a very small litter. Other breed sources give an average of 2 to 5, with a single puppy not unheard of.

A Maltese puppy weighs about 110 g (3.9 oz) at birth, according to the Norwegian study, so even a litter of 3 is under a pound of puppies. The risk in this breed is not the weight of the litter. It is the size of a single puppy relative to a very small pelvis. A singleton has the whole uterus to itself, no littermates competing for space or nutrition, and it often grows larger than a puppy from a litter of 3 or 4. A large puppy in a small dam is the classic set-up for a difficult delivery, and it is the reason a singleton Maltese pregnancy should be treated as high risk from the moment the X-ray shows one puppy.

The reported caesarean rate for the breed is about 25% of litters (BreedTracker, secondary), and the small pelvic size is the reason most often given. That is a breed-data figure, not a veterinary statistic, so treat it as a reason to plan, not a prediction of a section. But a singleton, a first litter, and a dam at the small end of the breed all push the risk up, and the vet should know about all three before the due date.

Confirm the count with an X-ray. Skeletons first appear on X-ray at about day 43 to 45, and the most accurate count comes from an X-ray after day 55 (Merck; AKC; VCA). For a Maltese, the X-ray is not a formality: it is the test that tells you whether you are dealing with a normal small litter or a singleton, and the delivery plan is different for each. Ultrasound can confirm pregnancy from 25 to 35 days, most reliably after day 28, but a reliable puppy count is beyond it. There is one more reason the count matters here: a relaxin blood test can be falsely negative in a very small litter, because 1 or 2 puppies may not produce enough relaxin to register, so a negative test before day 27 should be repeated rather than taken as proof she is not pregnant (VCA). With the count known, the litter-size calculator turns it into a space and workload plan for the litter.

What is different about a Maltese pregnancy?

The Maltese is one of the smallest breeds in this programme. Adults are rarely over 7 lb. She is a tiny dam carrying puppies that, individually, are large relative to her, and every part of the pregnancy plan has to respect that scale.

The whelping box should be small, warm, and low-sided, with pig rails to give the puppies a safe gap when she lies down, and it should be set up well before the due date so she is used to it. Warmth matters more than it does for a larger breed: a tiny dam and tiny puppies lose heat fast, so the box should be in a warm, draught-free spot, with a heat source the puppies can move away from as well as towards. A heating pad that covers the whole floor is a hazard, not a help; the puppies need a warm side and a cool side, and the dam needs to be able to leave the heat.

Exercise through pregnancy should stay regular and gentle: short walks at her normal pace, easing off in the final two weeks. Avoid rough play and jumping in late pregnancy, and carry her up and down stairs rather than letting her jump. Feeding follows the usual pattern: her normal adult food for the first two-thirds, then a gradual move to a more energy-dense food in the last third, with the amount guided by her condition and the vet's advice. Small meals, offered more often, suit a tiny dam in late pregnancy better than one large meal, because there is little room left in her abdomen. Do not add supplements unless the vet says to.

The delivery plan should be settled with the vet before the due date, not worked out during labour. The vet should know the breeding dates and the ovulation date if one was timed, the X-ray count, and whether the litter is a singleton. If it is a singleton, ask the vet what signs should bring her in early, and keep the clinic's number by the box. A planned caesarean is not the norm for this breed the way it is for the Boston Terrier, but a singleton that stalls is the situation in which one becomes necessary, and it is far better arranged calmly than as an emergency.

Maltese pregnancy week by week in brief

A Maltese litter of 2 or 3 may barely show until late, so the weeks are tracked by tests and temperature rather than by the belly. Weeks 1 to 2 are fertilisation and early embryo travel with no visible signs, week 3 brings implantation at about 15 to 18 days after ovulation and a vet able to feel the pregnancy from about day 21, and week 4 is when palpation is most reliable at 28 to 35 days and ultrasound is reliable from 25 to 35 days, most reliable after day 28. In week 5 appetite and weight rise and a relaxin blood test is positive from about 22 to 27 days after breeding, though a very small litter can test negative, week 6 may show only a slight belly, and week 7 is when X-ray first shows skeletons at about day 43 to 45 and confirms whether the litter is a singleton. Week 8 gives the best X-ray count after day 55 with twice-daily temperature checks, and week 9 brings nesting and a temperature drop below 100°F, often to 99°F or lower, usually 8 to 24 hours before labour. The hub staging for all breeds is in dog pregnancy week by week.

When to call the vet

Call the vet without waiting if any of the following happens. For a Maltese, the first two are the ones to watch hardest, because a singleton can stall quietly and a tiny dam has little reserve.

• A known singleton, or a known litter of 1 to 2, with weak or fading contractions, or a first stage that drags on without progress. Stage 1 usually lasts 6 to 12 hours, commonly up to 24 hours, and occasionally up to 36 hours in a first-time mother, but a singleton dam whose contractions are weakening should be seen sooner.
• Hard straining for 20 to 30 minutes with no puppy born (VCA).
• Over 2 hours between puppies, or over 4 hours when you know puppies are still inside.
• Green discharge before any puppy has been born; green discharge after the first puppy is normal.
• More than a day since the temperature drop, and no signs of labour yet.
• No whelping signs 64 days after the last mating (AKC), or 1 to 2 days past an ovulation-timed due date (Cornell). Do not wait for day 72 from a first mating before calling.
• Fever above 103°F while in labour, fresh bleeding for more than 10 minutes, trembling, collapse, or the dam turning listless or unresponsive.

Have the vet's number and the nearest emergency clinic's number beside the whelping box before the due date.

The calculator offers an estimated date, nothing more. It cannot confirm pregnancy, and it cannot replace a vet's care. A tiny dam leaves little margin for waiting, so any worry about the pregnancy or the labour should go straight to the vet.

Frequently asked questions

How long does a Maltese pregnancy last in days?

Roughly 63 days from ovulation (62 to 64 days), or 58 to 72 days from a first mating. Breed does not change the gestation length. A singleton litter may run a day or two longer than average, because smaller litters tend to run slightly longer, but the due date should not be adjusted for breed.

How many puppies do Maltese usually have?

Typically 2 to 4, averaging around 2 to 3. Singletons occur in about 10% of litters according to secondary breed data. Have the count confirmed by an X-ray after day 55, the most accurate way to count puppies.

Do Maltese need a C-section?

Not usually, but the reported rate is about 25% of litters (BreedTracker, secondary), and the risk is higher for singletons and first litters, because a single puppy can grow oversized for a very small pelvis. Discuss the delivery plan with the vet before the due date, and treat a singleton as high risk.

Why is a single Maltese puppy a concern?

Because one puppy has the whole uterus to itself, with no littermates competing for space or nutrition, so it often grows larger than a puppy from a litter of 3 or 4. A large puppy in a dam who is rarely over 7 lb is the classic set-up for a difficult delivery.

Can a Maltese get pregnant on her first heat?

She can conceive on a first heat, but a tiny dam that young should not be bred: she is still growing herself, and a pregnancy then carries higher risks for her and for puppies that are large beside her pelvis. Ask the vet and the breed club before planning a breeding.

How can you tell if a Maltese is pregnant?

At home you may notice her eating more, gaining a little weight, her nipples enlarging, her belly swelling, and nesting. No set of those signs confirms a pregnancy, and false pregnancy shows the same set. A vet confirms it by palpation from about day 21 (most reliable at 28 to 35 days), a relaxin blood test from about 22 to 27 days after breeding, or ultrasound from 25 to 35 days. With a very small litter a relaxin result can be falsely negative, so a negative test before day 27 should be repeated rather than trusted.