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Because few women know the exact day they ovulated or conceived, an ultrasound done in the first trimester of pregnancy has been shown to the be the most accurate way to date a pregnancy.

Physical touch and orgasms trigger the production of oxytocin, the hormone of love and bonding, which also happens to reduce physical pain.

Note: Oxytocin also boosts your level of trust in others so if you do go on a date this week, choose them wisely. It’s called the Follicular phase because your pituitary gland releases a hormone called Follicle Stimulating Hormone (FSH).

Indulge in a hot bath, watch a fun girlie movie and take a moment to reflect on the events of the past month.

If you get headaches and menstrual cramps during your period, ask your main squeeze for a roll in the hay.

However, if you did not get a first trimester ultrasound for dating and an ultrasound done to look at the baby's anatomy (usually at 18-20 weeks of pregnancy) differs from your LMP date by 10 to 14 days, we would change your date to the ultrasound estimate.

OBJECTIVE: To analyse the association between fetal size at time of dating ultrasound and risk for preterm delivery and small-for-gestational-age (SGA) birth and to evaluate if timing of ultrasound, that is before 14 weeks of gestation or after 16 weeks affects this association. SETTING: Ultrasound departments of Ultragyn, Stockholm, Sweden.Misclassification of births as postterm was more common in younger women, those of nonoptimal prepregnancy body weight, cigarette smokers, and women who reported last menstrual period using preferred dates of the month.Conclusion: Last menstrual period estimates of the duration of gestation are subject to both random error and a systematic tendency to overstate the duration of gestation, most likely because of delayed ovulation.If the ultrasound date is within seven days of your LMP date, we would stick with your LMP date.Ultrasounds done later in the pregnancy are less accurate for dating, so if your due date is set in the first trimester, it shouldn't be changed.POPULATION: A total of 28,776 singleton pregnancies dated between 19.

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