lightening

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lightening

 [līt´en-ing]
the sensation of decreased abdominal distention caused by descent of the uterus into the pelvic cavity, 2 or 3 weeks before labor begins.

light·en·ing

(līt'en-ing),
Sensation of decreased abdominal distention during the later weeks of pregnancy following the descent of the fetal head into the pelvic inlet.

lightening

/light·en·ing/ (līt´en-ing) the sensation of decreased abdominal distention produced by the descent of the uterus into the pelvic cavity, two to three weeks before labor begins.

lightening

[lī′təning]
Etymology: AS, leoht, light
a subjective sensation reported by many women late in pregnancy as the fetus settles lower in the true pelvis, leaving more space in the upper abdomen. The diaphragm, no longer restricted by the fundus of the uterus beneath it, can move down more fully during inspiration, allowing deeper breaths. The stomach, too, is less compressed, so the woman can comfortably eat more food at each meal. Urinary frequency occurs as the fetus drops. The profile of the abdomen changes with lightening, because the round, full uterus is visibly lower. The baby is then said to have "dropped."
The descent of the foetus, resulting in decreased fundal height, an event that occurs about 2 weeks before labour, caused by physiologic changes of the uterus; lightening is characterised by an abrupt sensation of ‘lightness’ or relief from the weightiness felt by the mother which corresponds to the drop of the baby’s head into the pelvis

lightening

Dropping Obstetrics The descent of the fetus deeper into the pelvis, resulting in a ↓ in the fundal height, an event that occurs from days to wks–usually 2 wks before labor and is caused by physiologic changes of the uterus; lightening is characterized by an abrupt sensation of 'lightness' or relief from the weightiness felt by the mother which corresponds to the drop of the baby's head into the pelvis. Cf Lightning.

light·en·ing

(līt'ĕn-ing)
Sensation of decreased abdominal distention during the later weeks of pregnancy following the descent of the fetal head into the pelvic inlet.

lightening

The sense of relief felt, during the last three or four weeks of pregnancy, with the descent of the presenting part of the fetus, usually the head, more deeply into the pelvis so that the womb occupies a smaller volume of the abdomen. This reduces abdominal distention and occasions some easing of breathing and general discomfort. Lightening is usual in first pregnancies but may not be apparent later.
References in classic literature ?
I told him to stop, and he wouldn't; I said I'd help him to lighten the cart, and he wouldn't; so I have come to tell you.
Oft have I heard of you, and how you lighten the purses of the fat priests and knights.
If he could but once set eyes on him, he thought the mystery would lighten and perhaps roll altogether away, as was the habit of mysterious things when well examined.
If, then, just now you were to empty the supplementary reservoirs, to lighten the vessel, and to go up to the surface, the pumps must overcome the pressure of 100 atmospheres, which is 1,500 lbs.
At first, indeed, they were doubtful whether the king's visit to the parliament had been in order to lighten or increase their burdens; but scarcely was it known that the taxes were to be still further increased, when cries of "Down with Mazarin
My brethren," said Father Ephraim to the surrounding elders, feebly exerting himself to utter these few words, "here are the son and daughter to whom I would commit the trust of which Providence is about to lighten my weary shoulders.
His proposal was accepted, the deer being placed in the skiff in order to lighten the canoe, and in less than five minutes the little vessel of bark was gilding over the glassy lake, and was soon hid by the points of land as it shot close along the shore.
The smile, then, -- that innocent favor of young girls, -- did not even lighten her countenance; and if, at times, she did raise her eyes, it was to fasten them upon one or other of the cavaliers with such a fixity, that their gallantry, bold as it generally was, took the alarm, and became timid.
All was now confusion and despair--but an effort was made to lighten the ship by throwing overboard as much of her cargo as could be reached, and by cutting away the two masts that remained.
Mrs Musgrove had got Mrs Harville's children away as much as she could, every possible supply from Uppercross had been furnished, to lighten the inconvenience to the Harvilles, while the Harvilles had been wanting them to come to dinner every day; and in short, it seemed to have been only a struggle on each side as to which should be most disinterested and hospitable.
He retraced his steps, taking up his candle, burnt, he observed, well-nigh to the socket, and marking again, lighten it as he would, the distinctness of his footfall; after which, in a moment, he knew himself at the other side of the house.
Clair, the clouds lighten, though I should not venture to say that the danger is over.