Medical professionals use a standard set of up to three methods to date pregnancies: last menstrual period, ultrasound, and a physical exam.That way, regardless of where they trained or where they practice, any two doctors dating a pregnancy will predict the same due date or gestational age.Another example (this one from real life): "Standard payment terms are net 30 days - all payments are due 30 days from the date of invoice.
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24-hour interval, day, mean solar day, solar day, twenty-four hour period, twenty-four hours - time for Earth to make a complete rotation on its axis; "two days later they left"; "they put on two performances every day"; "there are 30,000 passengers per day"nowadays, present - the period of time that is happening now; any continuous stretch of time including the moment of speech; "that is enough for the present"; "he lives in the present with no thought of tomorrow"24-hour interval, day, mean solar day, solar day, twenty-four hour period, twenty-four hours - time for Earth to make a complete rotation on its axis; "two days later they left"; "they put on two performances every day"; "there are 30,000 passengers per day", of greater importance to her than those; that of her own death, when all these charms would had disappeared; a day which lay sly and unseen among all the other days of the year, giving no sign or sound when she annually passed over it; but not the less surely there.
When people discuss how far along in pregnancy someone is, they tend to do so in general terms: “She’s in the first trimester” or “She’s four months along.” However, many people have only a vague idea of what those phrases really mean.
After that date, if the payment is not completed, an interest charge of X% per month may be added to your acount, possibly plus other services charges.
NOTE: the amount X of interest charge must be specified in the agreement, nowadays it is usually about 1.5% per month.