Morning sickness may occur at any time of day and can last all day. It is a common symptom of early pregnancy and can begin as early as the first missed period but usually starts during the fifth and sixth week of pregnancy and persists until the 14th or 16th week.
FACTS: Your baby has more than doubled in size in the past week. Its tiny heart begins to form and will already have the power to pump blood around its own body.
Conception On its arrival, it becomes known as a blastocyst and floats freely within the womb cavity for about three days before embedding in the wall lining and linking to the blood supply.