1. By: Patricia Marie Manuel Kathrina Nadora Justine Rei Valenzuela

24. First Trimester (first 3 months) Conception to 4 weeks 8 weeks 12 weeks • Less than 1/10 inches long • Spinal cord, nervous system, gastrointestinal system, heart and lungs begin to develop • Amniotic sac envelopes the body • Less than 1 inch long • Face is forming with rudimentary eyes, ears, mouth and teeth • Arms and legs are moving • Brain is forming • Fetal heartbeat is detectable with ultrasound • About 3 inches long, weighs 1 ounce • Can move arms, fingers and toes • Fingerprints are present • Can smile. frown, suck and swallow • Sex is distinguishable

25. Second Trimester (middle 3 months) 16 weeks 20 weeks 24 weeks • About 5 1/2 inches long and weighs 4 ounces • Strong heartbeat • Thin, transparent skin formed • Downy hair (lanugo) covers body • Fingernails and toenails are forming • Coordinated movements; is able to roll over in amniotic fluid • 10 to 12 inches long and weighs 1/2 to 1 pound • Heartbeat is audible with stethoscope • Sucks thumb • Hiccups • Hair, eyelashes, and eyebrows have formed • 11 to 14 inches long and weighs 1 to 1 1/2 pounds • Skin is wrinkled are covered with protective coating • Eyes are open • Has strong grip

26. Third Trimester (last 3 1/2 months) 28 weeks 32 weeks 36-38 weeks • 14 to 17 inches long and weighs 2 1/2 to 3 pounds • Adding body fat • Very active • Rudimentary breathing present • 16 1/2 to 18 inches long and weighs 4 to 5 pound • Periods of sleep and wakefulness • Responds to sounds • May assume birth position • Bones of head are soft and flexible • Iron is being stored in liver • 19 inches long and weighs 6 pounds • Skin is less wrinkled • Less active • Gaining immunities from mother