Quickening

v. increase speed, accelerate; expedite, hasten; hurry, rush; enliven, invigorate; restore life to, revive

In pregnancy terms, the moment of quickening refers to the initial motion of the fetus in the uterus as it is perceived or felt by the pregnant woman. According to the Oxford English Dictionary, to "quicken" means "to reach the stage of pregnancy at which the child shows signs of life." In the twentieth century, ultrasound technology made it possible to see that a fetus is in motion even if the pregnant woman does not yet feel it. This technological development made the concept of "quickening" a bit more complex.
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Quickening /quick·en·ing/ the first perceptible movement of the fetus in the uterus. quick·en·ing n. [more]Quickening - Community and Resources

Noun
1. the process of showing signs of life; "the quickening of seed that will become ripe grain"
(hypernym) organic process, biological process
2. the stage of pregnancy at which the mother first feels movements of the fetus
(hypernym) degree, level, stage, point
(part-holonym) pregnancy, gestation, maternity
(derivation) quicken
3. the act of accelerating; increasing the speed
(synonym) acceleration, speedup
(hypernym) speed, speeding, hurrying
(derivation) accelerate, speed up, speed, quicken

Verb
1. move faster; "The car accelerated"
(synonym) accelerate, speed up, speed
(hypernym) intensify, deepen
(hyponym) brisk, brisk up, brisken
(derivation) acceleration, quickening, speedup
2. make keen or more acute; "whet my appetite"
(synonym) whet
(hypernym) stimulate, excite, stir
3. give life or energy to; "The cold water invigorated him"
(synonym) invigorate
(hypernym) stimulate, excite
(derivation) quickener, invigorator, enlivener
4. show signs of life; "the fetus quickened"
(hypernym) move
(derivation) quickening
5. give new life or energy to; "A hot soup will revive me"; "This will renovate my spirits"; "This treatment repaired my health"
(synonym) animate, recreate, reanimate, revive, renovate, repair, vivify, revivify
(hypernym) stimulate, arouse, brace, energize, energise, perk up
(verb-group) come to, revive, resuscitate
(derivation) quickener, invigorator, enlivener

(p. pr. & vb. n.)
of Quicken
  

(n.)
The first motion of the fetus in the womb felt by the mother, occurring usually about the middle of the term of pregnancy. It has been popularly supposed to be due to the fetus becoming possessed of independent life.
  

(n.)
The act or process of making or of becoming quick.