amniotic sac

Also found in: Dictionary, Medical, Encyclopedia, Wikipedia.
Related to amniotic sac: placenta, amniotic fluid, yolk sac
Graphic Thesaurus  🔍
Display ON
Animation ON
  • noun

Synonyms for amniotic sac

thin innermost membranous sac enclosing the developing embryo of higher vertebrates (reptiles, birds and mammals)

References in periodicals archive ?
Ian, who has helped to deliver numerous babies in his eight-year career, explained: "Katie made a very unusual entrance to the world, arriving in her amniotic sac, still intact - something that is extremely rare and is estimated to happen only around six times a year nationally.
Paramedic Ian Nattrass explained: "Katie made a very unique entrance into the world, arriving in her amniotic sac still intact - something that is extremely rare and is estimated to happen only around six times a year nationally.
But the dad of four realised something wasn't right as baby Heather's head was still inside the amniotic sac.
Noah's birth was an example of what was known as the en-caul birth, which meant that a portion of the amniotic sac or a thin, filmy membrane remained on the child's head at birth.
Yellow-brown fluid in the amniotic sac is also a sign of trouble, because it means the calf defecated in utero, which is a clear indication of stress, and that means serious trouble.
Adding to her worries, there was a 50-50 chance of miscarriage because the IUD was close to the amniotic sac.
"Water helps form the placenta and amniotic sac and is a key component of breast milk.
Costing around PS9,000, the procedure involves lifting the womb entirely out of the abdomen and creating a small hole in the uterus wall to operate on the foetus inside the amniotic sac.
Her amniotic sac ruptured, but this apparently went undetected by Salmaniya Medical Complex (SMC) staff - who allegedly told her it was normal to pass water because the foetus was gaining weight and sent her home.
Because of the increasing pain, not correlated with fetal expulsion, and of the worsening clinical conditions, we performed transabdominal 2D ultrasound that showed, inside the peritoneal cavity, herniation of the amniotic sac and fetus through the uterine wall along the previous isthmic laparoscopic myomectomy scar (Figure 2(b)).
Fetal surgery involves penetrating the highly delicate amniotic sac, increasing health risks to the fetus.
A team from the University of Michigan reports that they have coaxed pluripotent human stem cells to grow on a specially engineered surface into structures that resemble an early aspect of human development called the amniotic sac.
"At 10.24am Everleigh Gray Siddle was born in the pool (still in her amniotic sac that the midwife hurriedly had to break) just 30 minutes after the midwife arrived.