Fertility Charting Myths: Implantation Dip

Kati Bicknel
Getting Pregnant
February 15, 2013

Okay, so now that we’ve got the whole “ovulation dip” out of our collective system, let’s move on to its cousin implantation dip.

These two were cut from the same cloth … the cloth called “O.M.G! I WANT TO BE PREGNANT RIGHT! NOW! AAAAAAAAGGHH!!!” This cloth is totally suboptimal for your sanity. Stop fondling that cloth.

But I digress. Let me first tell you what “implantation dip” is. Implantation dip happens during your luteal (postovulatory) phase. It’s when you get a temperature that is lower than your typical luteal phase temperature around 7 to 10 days after ovulation.

This happens on some charts, and, of the charts it does happen on, many of them do not result in pregnancy.

A dip in temperature during the luteal phase can be caused by the surge of estrogen that happens around mid-way through the luteal phase, whether or not you get pregnant.

This luteal phase dip can happen in a chart regardless of whether or not you are trying to, or do, get pregnant.

And you can be pregnant without ever seeing a luteal phase dip on your chart.

Are you beginning to see how this luteal phase dip = pregnancy thing doesn’t really add up?

One RELIABLE way to look for pregnancy on a chart using temperature is to look for 18 high temperatures in a row, after ovulation. That very often means that pregnancy has occurred! (But not always, there is such a thing as Lutenized Unruptured Follicle Syndrome, where your temperature will stay high for more than 18 days, but you’re not pregnant. I’ll talk about that another time, promise.)

Anyway, implantation dip is not a reliable indicator of pregnancy, so don’t freak yourself out looking for it! If you’re trying to get pregnant, it’s totally acceptable to chiiill out and enjoy your last days/weeks/months as a mother of the current amount of children that you have. (If that’s a resounding NONE, enjoy that too.) Don’t let any panicky fertility message board reduce your desire to remain sane. If you ARE pregnant you’ll know soon (and for the rest of your life).

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