Pregnancy Testing

The biochemical diagnosis of pregnancy may be made very early with the use of qualitative serum bhCG tests of blood and urine. Modern tests can detect serum bhCG levels of 20 mIU/mL or lower in urine and can diagnose pregnancy within 7 to 10 days after conception, at 3 weeks of gestational age. Gestational age is measured from the first day of the last menstrual period. Quantitative serum bhCG levels correlate with the gestational age of the normal pregnancy. At any given gestational age, serum bhCG titers are markedly higher when twins (or multiple gestations) are present. Table.109-1 indicates the approximate gestational age at which different sonographic and serum markers appear in early pregnancy.7 The standards shown in the table are those of the International Reference Preparation (IRP). Some institutions may use an older standard called the Second International Standard, with values approximately one-half of the IRP values.

Gvatod Triniflbimnd Trnuram 5 BfcCC Lr.d

¿ga_landnorij Iramak] W_

jKtkd i^uikti ui CnuioHluc W-3U

~ yrttc VK »-Jtjnfcljt. hIUtL

tub. Tfdkst^d Veil in ud fnL iijOWiJjMU

M pfl'jf frii-Arr nlU^L

W- tfcffttUiiPol Ri^tEH? Ptrpisi!

Hearing Aids Inside Out

Hearing Aids Inside Out

Have you recently experienced hearing loss? Most probably you need hearing aids, but don't know much about them. To learn everything you need to know about hearing aids, read the eBook, Hearing Aids Inside Out. The book comprises 113 pages of excellent content utterly free of technical jargon, written in simple language, and in a flowing style that can easily be read and understood by all.

Get My Free Ebook


Post a comment