After a male dog or cat
reaches sexual maturity at six to nine months of age, they are able to breed any time they are exposed to a receptive female.
Physical maturity isn't the same as sexual maturity; some
dogs reach sexual maturity as early as 8 months old, but that could be well before the dog has finished growing.
Small rodents and guinea
pigs reach sexual maturity at a very young age, so males and females should be housed separately to prevent pregnancies.
Veterinary guidelines still recommend that these procedures be done before your
pup reaches sexual maturity to obtain maximum health benefits such as protection from reproductive organ diseases, as well as preventing unwanted pregnancies.
In other words, we as veterinarians stand a better chance of preventing male dog behavioral problems when neutering is performed prior to the
pet reaching sexual maturity.
Indeed, one investigator points out that many veterinarians have been practicing early neutering for years, since there is an incredible range of ages when puppies and
kittens reach sexual maturity.
Each of these kittens can
reach sexual maturity as early as four months of age, and will start having their own litters.
The new life expectancies — 40 years for females and 73 years for males — suggest great whites
reach sexual maturity later than previously thought, making young deaths more devastating to the species.
Small breeds may
reach sexual maturity by the age of 4 months, large breeds may take six months or so, but it is advisable to delay breeding until around the ages of six or ten months respectively.
There are very few terns seeking new partners when the season begins, and most of these only do so either because they have
just reached sexual maturity or because their partner is dead.»
In fact, since domesticated dogs
soon reach sexual maturity and reproduce rapidly, an early human family would have been overrun by a pack of carnivores if some puppies were not culled.
Several studies have shown that in households where the biological father is missing,
children reach sexual maturity, have their first sexual experience, and are more likely to become teenage parents at a younger age.
Analysis of a trove of North American dinosaur fossils shows a highly elevated death rate among tyrannosaurs who had
recently reached sexual maturity, which occurred between the ages of 14 and 18.
They don't
reach sexual maturity for two years, and when they reproduce, they must release their eggs in water roughly 1,000 meters (or about 3,200 feet) deep.
The team argues that the timing of the emergence of the crest — when the
species reaches sexual maturity — supports the sexual selection hypothesis, where a trait evolves because of a preference for certain characteristics.
Thus chemistry within us works as such that we have a strong desire to mate and hence when
humans reach sexual maturity they get pre occupied with the opposite sex and try to meet and interact.