The stalked barnacle Pollicipes pollicipes (Gmelin, 1789), is a strictly littoral and essentially intertidal pedunculate cirripede that lives by forming dense aggregates or clumps on exposed rocky shores and cliffs associated with a high degree of hydrodynamism (Barnes 1996).
Since some women are unsure of the date of their last menstruation (perhaps due to period irregularities), a baby is considered full term if its birth falls between 37 to 42 weeks of its estimated due date. 1  The unborn baby spends around 37 weeks in the uterus (womb), but the average length of pregnancy, or gestation, is calculated as 40 weeks.
This is your babyâs corrected age. A term pregnancy is 40 weeksâ gestation. To determine the number of weeks premature your baby was at birth, subtract his gestational age at birth from 40. For example, if your son was born at 28 weeksâ gestation, he was 12 weeks (3 months) premature. If he is now 6 months old (24 weeks since birth), his corrected age is 24 weeks - 12 weeks = 12 weeks (3 months).