You still feel nauseous and fatigued like you have during the last two months. Heartburn, bloating, food aversion and craving accompanied by acne and pimples as well remain classical symptoms of the first trimester. You may feel slightly dizzy and, perhaps, even faint if you suddenly get up after a long duration of sitting or from a lying-down posture. Slow down your movements a bit. Get up slowly because, it is quite possible, that your blood pressure is slightly lower than normal. There is nothing to get worried though.
Your weight gain will be, probably, noticeable. So, will be the bump. It may or may not be big but this is the month when the baby is fully formed. The hair and fingernails begin to develop. The reproductive organs will begin to develop though it may not be visible. (Sex determination is prohibited by law in India). But the best news is that the chances of miscarriage recede dramatically.
By the end of this month, all those uncomfortable symptoms will begin to subside making you feel a little more energetic. Also, the increased presence of oestrogen and progesterone also leads to mood swings in the mothers. Constipation is a common occurrence, too, during this stage.
As for changes in the baby, the tail must have disappeared by now. Eyelids would have fused together or be shut. The heart has fully developed into four distinct chambers. The brain becomes the most prominent feature of the foetus. The foetus also becomes very active inside the womb but is too small for the mother to detect any movements. After all, the foetus is just about 12 cm long and barely weighs a 100 gms.