There is no age, it happens when you hit puberty.
the age is seventeen
Maybe around 2months and 2 weeks.
Kangaroos are marsupials (mammals with pouches) and give live birth to a fetus. This fetus contiues to grow and develop in the kangaroos front pouch until it reaches a certain age to where it can fend for itself.
A female is born with all of the eggs she will ever have. Upon reaching the age of sexual maturity the female will begin menstruating causing eggs to leave the Ovaries and travel down the Fallopian Tubes.
I will assume you mean the start of menstruation. That typically happens around age 10, but it has been documented to happen as early as age 6.
A pig fetus' age can be determined by measuring its crown-rump length or using ultrasound to visualize its development stage. Additionally, comparisons can be made between known developmental milestones for pig fetuses and the observed characteristics of the fetus in question. Consulting a veterinarian with expertise in reproductive physiology is the best way to accurately determine a pig fetus' age.
No, it's not possible, because they are not sexually mature. A girl cannot become pregnant until she reaches puberty, and has a period. Babies have not reached puberty (sexual maturity). It wouldalso be terrible if it happened. No baby/infant, toddler, child, or young teenager is old enough to consent to sexual intercourse, and any such activity would cause physical trauma bad enough to cause death.The baby does not produce the female hormone, estrogen, or start producing eggs until about the age of 9-14 years old.No a fetus cannot become pregnant.However, in the case of multiple births, when one fetus dies in utereo (in the uterus) the second fetus can possibly grow 'around' the deceased fetus so it is within the living fetus. BUT this is NOT pregnancy.
in the first trimester/3 MONTHS
24 weeks when the fetus have a 50% of survival.
Because the presumed date of conception is incorrect, or because of growth problems in the fetus.
The male body, from puberty into old age, is continuously producing sperm. Unlike the female body which is born with a certain number of eggs and never produces anymore.
The size and development of the fetus viewed on the sonogram indicates the age and therefore gives a good estimate of date of conception. The age is more closely determined in early pregnancy and becomes a little less accurate as the fetus grows but it is still possible to estimate the age of the fetus throughout the pregnancy.