How Long Are Dogs Pregnant?

Dogs are pregnant for approximately 63 days, or about nine weeks, though this can vary by a few days either way. Here’s a breakdown of what to expect during each stage of your dog’s pregnancy:

First Trimester (Weeks 1-3)

1. Fertilization: After mating, the sperm fertilizes the eggs, which then travel to the uterus.
2. Early Development: The fertilized eggs implant in the uterine wall, and the embryos begin to develop.
3. No Visible Changes: During this period, there are usually no visible signs of pregnancy.

Second Trimester (Weeks 4-6)

1. Embryo Development: The embryos grow rapidly, developing into fetuses with distinct features.
2. Physical Changes: You may notice some physical changes in your dog, such as increased appetite, weight gain, and mild abdominal swelling.
3. Veterinary Checkup: It’s a good idea to visit the vet for a checkup and possibly an ultrasound to confirm the pregnancy and check the health of the developing puppies.

Third Trimester (Weeks 7-9)

1. Rapid Growth: The fetuses continue to grow and develop, and your dog’s abdomen will become noticeably larger.
2. Nesting Behavior: As the due date approaches, your dog may start nesting behavior, preparing a comfortable place to give birth.
3. Milk Production: Your dog’s mammary glands may swell, and she may begin to produce milk.

Signs of Impending Labor

• Restlessness: Your dog may become restless and seek out a quiet, safe place to give birth.
• Panting and Shivering: She may start panting and shivering as labor approaches.
• Loss of Appetite: A decrease in appetite is common just before labor begins.
• Temperature Drop: Your dog’s body temperature may drop below 100°F (37.8°C) about 24 hours before labor starts.

Understanding the stages of your dog’s pregnancy can help you provide the best care for her and prepare for the arrival of the puppies. If you have any concerns or questions during your dog’s pregnancy, don’t hesitate to consult your veterinarian. They can offer valuable advice and ensure a healthy pregnancy and delivery for your dog.

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