3 months po pinakamaaga. Developed na ang sex organs nila during that time but mahirap hanapin sa ultrasound. Average is 4 to 5 months. Pinaka late is 3rd trimester or mismong pagkapanganak. CAS is ordered by your OB around 22 to 28 weeks. 😊
5mos po yung sa gender, cas po 22weeks-24weeks pede na po
pag 5 months sis