Placenta previa happens when the placenta partly or completely covers the cervix, which is the opening of the uterus. Your baby passes from the uterus into the cervix and through the birth canal during a vaginal delivery. Normally, the placenta attaches toward the top of the uterus, away from the cervix. Hereâs what happens with placenta previa: As your cervix opens during labor, it can cause blood vessels that connect the placenta to the uterus to tear. This can lead to bleeding and put both you and your baby at risk. Nearly all women who have this condition will have to have a C-section to keep this from happening.
Look up giga-in Wiktionary, the free dictionary. Giga (/ËdÊÉªÉ¡É/ or /ËÉ¡ÉªÉ¡É/) is a unit prefix in the metric system denoting a factor of a (short-form) billion (10 9 or 1000000000). It has the symbol G. Giga is derived from the Greek word Î³Î¯Î³Î±Ï, meaning  giant . The Oxford English Dictionary reports the earliest written use of giga in this sense to be in the Reports of the IUPAC 14th Conference in 1947: The following prefixes to abbreviations for the names of units should be used: G giga 10 9 Ã.
dual energy absorptiometry (DEXA) an imaging technique that uses two low-dose x-ray beams with different levels of energy to produce a detailed image of body components; used primarily to measure bone mineral density.