When the cord is wrapped around the neck of the fetus it is called a nuchal cord.

When developed enough to survive outside the womb, the cervix dilates and contractions of the uterus propel the fetus through the birth canal, which is the vagina.

When Chani begins a special Fremen fertility diet high in melange, Irulan loses her access to administer the contraceptives ; though urged by the Bene Gesserit Reverend Mother Mohiam to chemically abort any potential fetus, Irulan protests.

When examining the fetus, faint fetal heart sounds are also an important clinical sign of this condition.

When used, it is associated with an 85 % survival rate of the remaining fetus ( es ) with 5 % risk of cerebral palsy and a 33 – 39 weeks of gestation at delivery.

When the amniotic sac ruptures, production of prostaglandins increases and the cushioning between the fetus and uterus is decreased, both of which processes increase the frequency and intensity of contractions.

When an infant is born to an HIV-infected mother, diagnosis of an HIV infection is complicated by the presence of maternal anti-HIV IgG antibody, which crosses the placenta to the fetus.

When the user pushes down at a particular position, their finger pushes the front layer down through the spacer layer to close a circuit at one of the intersections of the grid.

When Bernardo pushes Tony, Riff punches him in Tony's defense.

When rotated clockwise the wheel pushes a collar against a series of friction washers bearing on the main driving gear.

When the container accelerates upward, the bottom of the container pushes the entire contents upward.

When the seed germinates, the root ( radicle ) of its embryo pushes out through one of the eyes of the shell.

When Frollo laughs during Esmeralda's hanging, Quasimodo pushes him from the heights of Notre Dame to his death.

When the brakes are applied, brake fluid is forced under pressure from the master cylinder into the wheel cylinder, which in turn pushes the brake shoes into contact with the machined surface on the inside of the drum.

When the cartridge is pressed into the pen, a small pin pushes in the ball, which falls inside the cartridge.

When the brake pedal of a modern vehicle with hydraulic brakes is pushed, ultimately a piston pushes the brake pad against the brake disc which slows the wheel down.

When the gang has a falling out after a series of pranks, it is Eric who pushes for everyone to make up.

When he possesses a devotee he often pushes himself around the temple on a chair with an oar, shouting naval commands and saluting members of the congregation.

When he pushes the middle one, a small door in his belly opens revealing a compartment which he uses to store items.

When Skylar asks Will to move to California with her, he panics and pushes her away, revealing that he is an orphan and that his foster father physically abused him.

When current from the starting battery is applied to the solenoid, usually through a key-operated switch, the solenoid engages a lever that pushes out the drive pinion on the starter driveshaft and meshes the pinion with the starter ring gear on the flywheel of the engine.

When Blake stumbles upon Steven in an innocent goodbye embrace with his former lover Ted Dinard ( Mark Withers ), Blake angrily pushes the two men apart ; Ted falls backward and hits his head, the injury proving fatal.

When they reach land the wave height increases dramatically as the base of the wave pushes the water column above it upwards.

When talking about ethnic humour, distinctions are sometimes made as to whether the humour comes from the inside or the outside, the idea being that when self-mocking humour comes from the inside, it pushes out the boundaries of acceptable or expected behaviours by making fun of one or more of the group characteristics known to the insider.

When the electrons in the atom are excited, for example by being heated, the additional energy pushes the electrons to higher energy orbitals.

When the man asks about a possible case of vampirism, Johnny explains that he has to keep a wall in his house wet with the blood of his victims because the wall changes color as it dries ( later the story changes to suggest a monster imprisoned there will break free ), then pushes the surveyor forcefully through a boarded window, scaring Squee in the process.

When a train passes through the tunnel it pushes out the air in front of it toward the closest ventilation shaft in front, and " sucks-in " the air to the tunnel from the closest ventilation shaft behind it.

When Kevin is almost run over by Jim's drunk friend, Edward pushes him out of the way, but cuts his face, causing witnesses to think he was attacking him.

When the pressure is below that within the lungs, the lungs expand and atmospheric pressure pushes air from outside the chamber in via the person's nose and airways to keep the lungs filled ; when the pressure goes above that within the lungs, the reverse occurs, and air is expelled.

When the lower ribs are stabilized and the central tendon of the diaphragm is mobile, a contraction brings the insertion ( central tendon ) towards the origins and pushes the lower cavity towards the pelvis, allowing the thoracic cavity to expand downward.

When, in late afternoon on the last day in June, he saw two people top the ridge to the south and walk toward the house, he quit work immediately and strode to his rifle.

When he saw the expression in her eyes, he knew he couldn't send them on.

When they turned in the saddle they could see the men behind them, strung out on the prairie in a flat black line.

When one of the men in the hall behind us spat on the floor and scraped his boot over the gob of spittle I noticed how the clerk winced.

When they reached their neighbor's house, Pamela said a few polite words to Grace and kissed Melissa lightly on the forehead, the impulse prompted by a stray thought -- of the type to which she was frequently subject these days -- that they might never see one another again.

When Fred Powell's brother-in-law, Charlie Keane, moved into the dead man's home, the anonymous letter writer took no chances on Charlie taking up where Fred had left off and wasted no time on a first notice:

When I fell on my back, I saw a vulture hovering.

Joyce went on, `` When we'd finished, Lou -- Mr. Thor -- asked me to stay a little longer.

When we opened the door again for business and switched on the lights she said:

When he sank on his knees, they had allowed him to char without administering the stroke of mercy.

When he got closer to the tree, Matsuo noted the wild look on his face.

When he rolled on the left side, propping on his left elbow, Matsuo seized his hair and pulled him back over.

When her hand touched his, fire went through Jack and he felt weak, but he managed somehow to get her on her feet.

When he finally left the sinister mansion on Perdido Street, he was carried out in a coroner's basket.

When you pass a church on an Irish bus, all the hands flurry in the sign of the cross.

When he was stripped, deloused and numbered by his guards, his much-thumbed sketchbook was seized and thrown on a pile of prisoners' goods to be confiscated.

When combined with the metaphysical notion that pure forms of this universe are best appreciated when least embodied in a material substratum, it becomes clear that while earth will be dross on a scale of material-formal ratios, celestial bodies will be of a subtle, quickened, ethereal existence, in whose embodiment pure form will be the dominant component and matter will be absent or remain subsidiary.

When the family business failed, Mercer left school and on his mother's urging -- for she hoped that he would become an actor -- he joined a local little theater group.

Besides doing a single song, `` When The Sun Comes Out '', they worked on the ambitious American-Negro Suite, for voices and piano, as well as songs for films.

When I returned to make my report, the Hetman did not remember having sent me on the secret mission.

When Fred wheeled him back into his room, the big one looking out on the back porch, and put him to bed, Papa told him he was very tired but that he had enjoyed greatly the trip downtown.

When the young biologist, Dr. Ballard, began to show interest in our daughter Elizabeth, this induced a corresponding interest, on our part, in him.

When he turns briefly to literary style, in the Third Book, he again looks to the effect on the audience.