sperm fertilizes ovum to and it becomes a zygote

implantation of blastocyst into lining of uterus

HCG levels are high enough to be detected in mother's urine

neural tube closes & arm and leg buds appear

nose forming & measures about 1/2 inch

elbows bend and fingers/toes lose their webbing

RBC formation is occuring in the liver & external genitalia is forming

fetus begins urinating into the amniotic fluid

fetus is able to hear external sounds

vernix caseosa forms

lanugo forms & the fetus develops a sucking reflex

lungs develop and produce surfactant

fetus is able to open eyes, has eyelashes, & the CNS has gained the ability to regulate body temperature

RBC are developing in the bone marrow & the fetus may have a full head of hair

pupils in eyes are able to respond to light changes

fetus measures about 12 inches

fetus turns head down to be in an ideal position for birth