Dating of pregnancy: time to forget the last menstrual period

Epidemiology of pregnancies with unknown last menstrual period

the Epidemiology of normal pregnancies with unknown last menstrual period (LMP) was studied in 1192 singleton  pregnancies.the LMP was unknown in 240(20.3%) pregnancies.unknown LMP is associated with high rates of low birth weight and all low socio-economic and socio-demographic status.such characteristics are also associated with a high rate of preterm deliveries.any possible bias introduced i...

Early childhood development when second-trimester ultrasound dating disagrees with last menstrual period: a prospective cohort study

BACKGROUND When an ultrasound-based estimate of gestational age (GA) is less (greater) than an estimate based on a definite last menstrual period, the fetus may grow slower (faster) than average. While the association between these discrepancies in GA estimates and adverse perinatal outcomes has been examined extensively, there is scant evidence about long-term effects, such as child neurodevel...

Music: The Last Thing We Forget

Have you ever wondered what happens in your brain when you think about your favorite songs? Recent research has revealed an area of the brain that is active when we listen to music that we know. This musical memory area is separate from the parts of your brain you use to remember things you have learned in school or details about events that happen in your life. In this article, we will show yo...

Natural limits of pregnancy testing in relation to the expected menstrual period.

CONTEXT Pregnancy test kits routinely recommend testing "as early as the first day of the missed period." However, a pregnancy cannot be detected before the blastocyst implants. Due to natural variability in the timing of ovulation, implantation does not necessarily occur before the expected onset of next menses. OBJECTIVE To estimate the maximum screening sensitivity of pregnancy tests when ...

Use of the last menstrual period (LMP) in timing human pregnancies.