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A stillbirth can often result in the feeling of guilt or grief in the mother. [10] The term is in contrast to miscarriage, which is an early pregnancy loss, [11] and sudden infant death syndrome, where the baby dies a short time after being born alive. [10] Often the cause is unknown.
In domestic dogs, sexual maturity occurs between the ages of 6 and 12 months for both males and females, although this can be delayed until up to two years of age for some large breeds. [2] Pregnancy is possible as soon as the first estrus cycle , but breeding is not recommended prior to the second cycle. [ 3 ]
Fetal resorption (also known as fetus resorption) is the disintegration and assimilation of one or more fetuses in the uterus at any stage after the completion of organogenesis, which, in humans, is after the ninth week of gestation.
Miscarriage rates among all fertilized zygotes are around 30% to 50%. [1] [7] [60] [123] A 2012 review found the risk of miscarriage between 5 and 20 weeks from 11% to 22%. [157] Up to the 13th week of pregnancy, the risk of miscarriage each week was around 2%, dropping to 1% in week 14 and reducing slowly between 14 and 20 weeks. [157]
The miscarriage may be evidenced by a clot-like material passing through and out of the vagina. [157] About 80% of miscarriages occur in the first 12 weeks of pregnancy. The underlying cause in about half of cases involves chromosomal abnormalities. [158] Stillbirth is defined as fetal death after 20 or 28 weeks of pregnancy, depending on the ...
Lupus causes an increased rate of fetal death in utero and spontaneous abortion (miscarriage). The overall live-birth rate in somebody with lupus has been estimated to be 72%. [ 6 ] Pregnancy outcome appears to be worse in those with lupus whose disease flares up during pregnancy.
Embryo loss (also known as embryo death) is the death of an embryo at any stage of its development which in humans, is between the second through eighth week after fertilization. [1] Failed development of an embryo often results in the disintegration and assimilation of its tissue in the uterus , known as embryo resorption.
Miscarriage, also known as spontaneous abortion and pregnancy loss, is the natural death of an embryo or fetus before it is able to survive independently. [ 6 ] [ 7 ] Some use the cutoff of 20 weeks of gestation , after which fetal death is known as a stillbirth . [ 8 ]