Hi mama! At 40 weeks, that's definitely something na kailangan i-check ng doctor right away, hindi mo dapat maghintay, okay? Fetal heart rate can vary, pero kung concerned ka, especially ngayon na you're full-term, mas safe na makita agad ng OB mo para ma-monitor baby ninyo properly. Praying it's all okay, pero don't wait on this one, go to your clinic or hospital na, anak. Keep us posted!