I need a wee!

The embryonic tail has disappeared. Cartilage and bone begin forming, and the intestines start moving from the umbilical cord into the abdominal cavity. The brain remains the largest organ. The pharynx and oral cavity become visible, and the external ear differentiates. The retina and eyelids become distinct. Nostrils appear and the nerve for smell develops. The oesophagus lengthens, and blood leaving the heart begins to be pumped in two directions. The nipples are visible. The small intestine lengthens, the kidneys finish forming and begin producing urine. Primitive sex cells form and the external genital organs begin differentiating, although sex is not yet distinguishable. The hands and elbows become clear, nerve conduction begins in the legs, and the baby starts moving gently in the surrounding fluid.

Your second expected period has now been missed. Although weight gain may not be obvious, your breasts become larger, fuller and tender. A supportive bra may be useful. Stomach contents entering the oesophagus may cause heartburn. Your daily calorie requirement has increased by about 300 calories.