Exact(41)
The perissodactyls bear well-developed (precocial) young, usually a single offspring.
The dwarf antelope breeds year-round, with seasonal peaks and produces a single offspring after an estimated gestation of six months (maybe less).
Parents who violate the policy – which limited most to a single offspring but is to be replaced with a two-child rule for all – can register extra children only after paying a hefty fee.
Even if she does not go to the hideous expense of nurturing a single offspring in her womb for nine months but, like a stickleback, simply lays her eggs in a nest prepared by a male, she still has to produce those eggs.
The probability that the lineage of a single individual eventually goes extinct is the probability that it dies without offspring (p0) plus the probability that it produces a single offspring whose lineage dies out (p1q) plus the probability that it produces two offspring whose joint lineages die out (p2q2), and so on.
Females give birth annually to a single offspring.
Similar(18)
The other family — three members in all — mirrored our own, except that their single offspring was a girl and they were, on the whole, more ample; by contrast, my entire family weighed three hundred pounds.
Each female produces one single offspring at a time and the third instar larva developed within the uterus is larviposited as a mature larva into humid soil in a shady place.
Single offspring are born after a gestation of 10 to 11 months.
"ONE mouth, six pockets", is how the Chinese describe a typical family on the mainland today: a single, precious offspring doted on by its parents and two sets of grandparents.
In a strange twist on the proverb about not putting all your eggs in one basket, she divides the resources needed to produce a single healthy offspring into two.
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