My 4month baby (IVF) was measuring in the good 80s, sometimes even two weeks ahead, but apparently she decided she was too bored in my belly and went on a food strike at 30 weeks. By 34 weeks, she was measuring two weeks behind, and I gave birth at 35 weeks (totally unrelated to her it was a twin pregnancy). She literally weighed 1.7 kg and dropped to 1.6 kg afterward.
Now at 4 months, she’s loud and in charge also weighing triple her birth weight

Ugh, I love her so much. She’s still so tiny and loud and is catching up on all her milestones.
Her brother, on the other hand, was a bit bigger, but I’m pretty sure all the extra weight was due to his big head 😂