Welcoming a female puppy into your life is a wonderful experience, but it also comes with unique considerations, especially regarding her reproductive health. Whether you’re curious about her first heat cycle, planning for responsible breeding, or preparing for whelping (giving birth), this guide from Petyaari Pet Clinic offers essential information for pet owners. We’ll cover everything from puberty and the estrus cycle to pregnancy care and what to expect during delivery, helping you provide the best support for your furry friend.”
When Do Female Dogs Reach Puberty? Age & Breed Variations

The most common age for puberty is 6 to 9 months but due to considerable breed variations existing in a wide variety of canine breeds, the age of puberty is attained over a wide age range from 5 to 24 months. Smaller dog breeds tend to reach puberty at an earlier age than larger breeds.
Generally, the first estrus is observed to be irregular. The first proestrus signs may end abruptly without leading to a standing estrus.
Understanding Your Dog’s Estrus (Heat) Cycle: Phases & Behaviors


Female dogs have unique estrus cycles as compared to domestic animals as every phase is prolonged in them. The female dog is categorized as dioestrus (coming into heat twice a year) and has around 1 to 3 oestrous periods each year. Although an average oestrous cycle is about to last 6 months but this duration sometimes varies between 4 to 12 months. No fixed pattern of cyclic behaviour exists in general, but several breeds (in Indian climatic conditions) have a slight tendency to come in estrus in the mid-November to February months of the year.
1) signs of dog in heat (proestrus)
- Proestrus lasts on average for 9 days but may last from 3-17 days.
- External signs include vulvar swelling, bloody discharge, and an unwillingness towards the male’s mounting advances.
- Vaginal bleeding continues from proestrus until the first week of estrus in most cases.
- During proestrus, a female dog is even found to show aggressiveness when the male tries to mount.
- Increased urination frequency.
2) Fertile period dog (estrus)
- The word estrus comes from the Greek word oistros, which means “frenzied passion”.
- Estrus on an average span of 9 days but occasionally it may last from 3 to 21 days.
- Premating exploration and communication take place which includes searching for males, increased vocalization, and restlessness.
- The behaviour of female dogs in estrus results in courtship and mating.
- The prominent change observed is submissive behaviour and the female dog ‘flagging’ her tail, as if exposing her vulva for courtship.
- Variations in behaviour are more likely to happen during the first estrus period than in subsequent ones based on age, season, malnutrition and hormonal imbalances.
3) Dioestrus Behaviours
- On the onset of dioestrus, the female dog again becomes unreceptive to males refusing male advances. The dioestrus lasts for about 60 days, same for the pregnant as well as non-pregnant female dogs.
- Anestrus is the inactive period until the start of the next estrus and this generally spans for around 80-100 days.
Optimal Breeding Time for Dogs: Advice from Our Hyderabad Vets

Natural mating: when naturally crossed, put both the male and female dog together for the entire oestrous period (about for a week) or allow them to mate every day as long as the female allows (or receptive). It’s adequate if at least three matings happen in the first 6 days after ovulation. Ovulation generally happens 24-48 hours after the Luteinizing Hormone (LH) surge .
Responsible breeding involves more than just timing. It includes health screening for genetic conditions, ensuring your dog is of appropriate age and temperament, and being prepared for the commitments of raising puppies. We encourage a consultation to discuss these aspects.
While these are general guidelines, accurately timing breeding can significantly improve success rates. At Petyaari Pet Clinic in Hyderabad, we offer services like ovulation testing (Progesteron) to help pinpoint the most fertile period for your dog. It is generally recommended to avoid breeding a female dog during her first estrous cycle to ensure she is fully mature. Consult our vets for advice tailored to your dog’s specific breed and health.
Dog Pregnancy: Signs, Care & What to Expect
As the pregnancy approaches its end, appreciable behavioural changes are observed:
- Seeking isolation in a quiet place with some bedding material around.
- An innate behaviour of digging is present for nest building.
- As the female becomes more restless, activities like rearranging bedding material will become more frequent as the parturition approaches.
- Decreased appetite.
- Uneasy behaviour, going in and out when placed indoors, getting up and lying down, and postures for urination now and then.
- Her cuddling increases towards favoured individuals whereas becomes defensive against strangers.
Dog Labor & Delivery: A Step-by-Step Guide to Whelping
The Contraction Phase
- Marked by decreased activity with the dog mostly sitting or lying on her side.
- Respiration increases from 100 to 150 breaths per minute (lasting a minute or two) alternated with normal rates of 18 to 25 breaths per minute and an intermediate rate of 40 to 60 breaths per minute.
The Emergence Phase
- Acutely seen as shivering and strong uterine contractions, the puppy is lodged into the birth canal in a squatting or lying position.
- Externally, a bulge (puppy along with amniotic membranes) appears above the vulva. The chorioallantoic membranes (part of the puppy’s sac) start protruding from the vulva and rupture releasing watery contents.
- This phase usually lasts for a few seconds but when prolonged, the female dog herself starts removing the foetal membranes by licking and it is natural.
The Delivery phase
- The mother immediately starts licking the foetal fluids and remaining membranes from the puppy which initiates respiration.
- The female dog will chew the umbilical cord and eat the foetal membranes and care should be taken that she should not be allowed to chew it wildly, harming the puppies.
The Placenta expulsion Phase
- Expulsion of the placenta occurs when uterine contractions resume after delivery of foetuses. Canine females have an innate habit of eating the expelled placenta but this behaviour is not necessarily observed in dogs reared indoors.
- During parturition, care should be taken to minimise the disturbances. When disturbances occur while the female dog is in labour, the puppy or puppies may not be expelled. Prolonged disturbances disrupt or halt the labour as the mother becomes fearful and anxious.
New Mother Dog Care: Understanding Maternal Instincts & Puppy Care
- In the initial 12 hours after the parturition, the mother spends the whole time with puppies licking them, protecting them
- She allows regularly familiar people to come near puppies, handling her puppies but remains vigilant for them.
- For the first 7 to 10 days, most of the time she spends nursing them without leaving the site for a longer time. By the end of 2 weeks, her outing time increases.
- The continuous presence of the mother with the newborns helps them maintain body temperature which they are not capable of doing on their own at that stage of life.
- When puppies require intense nursing and warmth in the initial days, the mother stays at the same place where they were whelped instead of switching to another nesting site.
- When the puppies are approximately one month age, their behaviour towards them changes signalling fewer attempts to nurse and reduced frequency of feeding. She starts spending more time away from them.
- She also practices inhibited bites to avoid excess feeding and attachment.
FAQs:
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What is the best time to mate a female dog for pregnancy?
The best time to mate a female dog is during her estrus period (when she is ‘in heat’ and receptive), typically a few days after she starts her heat cycle. This fertile window usually lasts about 5-9 days. For optimal timing and to increase the chances of successful pregnancy, veterinarians at clinics like Petyaari Pet Clinic in Hyderabad can perform tests to pinpoint ovulation. Remember, responsible breeders also consider the dog’s age, health, and temperament before mating.
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Can a female dog get pregnant if she’s not in heat?
Generally, no. A female dog can only conceive when she is in the estrus (heat) phase of her reproductive cycle and ovulating. While mounting behavior might occur at other times, successful mating leading to pregnancy is tied to this fertile period.
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How often do female dogs go into heat?
Most female dogs go into heat about twice a year (every 6 months), though this can vary based on breed, size, and individual factors. Smaller breeds might cycle more frequently, while some giant breeds may only cycle once every 12-18 months. The first heat cycle is often irregular.
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What pre-breeding health checks are important for my dog?
Before breeding, it’s crucial to ensure your female dog is healthy. This includes a general wellness exam, vaccinations, parasite control, and potentially specific genetic screening relevant to her breed. Our veterinarians at Petyaari pet clinic can guide you on essential pre-breeding health checks to promote a safe pregnancy and healthy puppies. This is a key part of responsible dog breeding.
Conclusion
Caring for your female dog through her reproductive stages requires understanding and preparation. We hope this guide has empowered you with knowledge about her heat cycles, pregnancy, and the whelping process. For personalized advice, pre-breeding check-ups, pregnancy monitoring, or assistance with whelping, pet owners in Hyderabad are invited to contact Petyaari Pet Clinic. Our experienced team is dedicated to supporting you and your pet. Call us today at +91-995937244 or book appointment. Remember, responsible breeding practices are crucial for the health and well-being of both mother and puppies.
About Author
Dr. Ashish Yadav, Doctoral Researcher, NDRI
Doctoral Researcher National Dairy Research Institute, Karnal. Research Scholar at National Bureau of Animal Genetic Resources (NBAGR).
