Animal Gestation and Incubation

Smaller mammals have shorter gestation periods. If a mother mouse kept her young inside her uterus/placenta for too long, the young would become so big that the mother would die. Also, mice have very short lifespans due to their heavy predation and small size, so a female mouse needs to produce as many young as possible in her short life in order to keep the species from going extinct. A short gestation period increases fertility in that more litters can be produced in the same amout of time. Thus, mice have evolved very short gestation periods.

Although a mouse's gestation period is only about 20 days, there are some mammals, such as certain opossums, whose gestation periods are even shorter.

pregnancy time completely depends on the type of animal. Not all animals have the same average time.
You need to be more specific. There are thousands of species of animals and the gestation periods are vastly different depending on the animal.

I'm guessing this is a chihuahua dachsund mix?! I may be wrong but i think it is approximately 65 days. Congrats!

It is not possible to have a gestation sac without the baby, since the sac is a group of cells that separated from the ovule to create the sac. However, something might be something wrong with your glands, thus the low HCG level.

Horse cows do not exist.

Technically hummingbirds do not have a gestation period, as they lay eggs rather than give live birth. However, the incubation period is 2-3 weeks.

A honey badger has an average gestation period of 6 months. (For mammals the gestation period is the time in which a fetus develops, beginning with fertilization and ending at birth.)

The average gestation period of a pig is 112-114 days.

Passenger pigeon, Carolina paraquet.

6 Weeks Gestation actually counts from fertilization. However many weeks pregnant you are is actually counted from the first day of your last period. So, when you are 20 weeks pregnant you are actually only 18 weeks gestation.

You may of had your days wrong and you really is 6 weeks or they may be measuring your baby head incorrectly

For most women, a symptom that labor is going to begin in the next few days is frequent small bowel movements, or diarrhea.

Approximately 11 to 12 months - depending on the species.

Well, the first thing they do is just like any baby animal would start to do: Breathe. Then they get a sense of their surroundings and experience the loving attention of their dams as they get cleaned off by the dam's tongue. This stimulates them to start to get to their feet. They also pass their first feces as they try to get on their feet. After numerous falls and trial and errors the calves get their feet under them and slowly and shakily make their way to their mother's udder. At first they may go to the wrong area, but with encouragement they finally make it, latch on and start suckling. Once they are satisfied, they lay down again for a nice, long sleep.

The larger and more complex an animal is, the longer it takes them to develop. An elephant's trunk contains over 100,000 muscles, and the newborn calf can weigh around 300 pounds. It not only takes a long time to develop all of those individual parts, but it takes some time to put on 300 pounds worth of weight.

Another reason is because the massive amounts that elephants consume, they have slower reproduction rates to help control their own population. This keeps the population from getting too large and eating more than the environment can support. In natural circumstances, this is a good thing. However, with the problem of poaching, it means they are having trouble keeping their population up.

Also known as the third trimester, it is the final stage of the gestation period where the fetus (or fetuses, depending on the animal in question) experience the most growth in body tissues, and lungs begin to develop and start to become functional.

The Okapis gestation period is about 458 days on average

Irkens are closely related to insects and infact do lay eggs. However how many and what size they are and how many in a clutch, is very debateable.

average of 6 weeks.

When studying birds it is important to learn their gestation period. A Brown Thrasher has an incubation time of ten to fourteen days, and a nestling time of nine to thirteen days.

63 to 65 days

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About 3 months.

After pregnancy you can bleed any where from 2 weeks to 6 weeks depending on the person and if you are nursing. If you are nursing it will be shorter and your actual period will probably not return until the baby is eating solids and even then it is often very light and non-regular. If you do not nurse it should take you about 4 weeks after you stop bleeding from birth to have your first period. Then your cycle should shift back into what is normal for you.

Platypuses do not give birth to live young. They are one of only two types of mammals to lay eggs. Fertilised platypus eggs stay in the mother's body for around 28 days. When they are laid, they incubate for another ten days before hatching.

9 monthes