"She's Not Being Dramatic. Here's What's Actually Happening Inside Her Body."

Let me tell you what most fathers get wrong in the first trimester. They see a woman who looks the same as she did three weeks ago. No belly. No visible signs. And they think — consciously or not — that nothing has really changed yet.

They are wrong. And that wrong reading costs them — and her — in ways that are hard to undo.

The placenta is being built from scratch. Her blood volume is increasing. Her immune system is suppressing itself. And her hormones have spiked to levels she has never experienced before in her life. Those hormones directly affect the same neurotransmitter systems that regulate mood.

She is not being difficult. She is being flooded.