Who'll is a contraction for who will. Why'd is a contraction for why would. "When's" a contraction for when is.
which
Questions that begin with the letters wh:whatwhateverwhenwherewhichwhowhomwhosewhy
Whale, whaleboat, wharf, wheat, wheel, wheelbarrow, wheelhouse, whip, whirlpool, whiskers, whiskey, whisper, whistle, whitecap and whole are nouns. They begin with the letters wh.
cardiac contractions begin aroud the 5th week of pregnancy. A few days after that their limb buds begin to form.
The strongest indication that contractions are occurring in association with true labor is that the contractions begin to occur at regular intervals. This is contrary to Braxton-Hicks contractions, which are spontaneous, random uterine contractions that do not occur with actual labor.
Mostly it depends on the organism of the pregnant woman (some contractions begin day and a half before and some don't even have contractions) but usually they occur in less than 20 hours before giving birth.
The eponym for those contractions is Braxton-Hicks.
Six letter words that start with the letters wh:whackowhackswhackywhaleswhammywharfswheelswheezewheezywhencewhinedwhinerwhippywhirlswhiskywhiterwholly
Others are where and who. They are all words that begin with 'wh' and also they begin with the 'h' sound. Some speakers drop the 'h' sound from the first four.
You've, You're, You'll
When the ventricles begin to quiver and do not employ coordinated contractions, the heart is said to be fibrillating.
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