FERTILIZATION AND IMPLANTATION

NOTES IN MATERNAL AND CHILD NURSING
Reference: NURSE’S NOTES: MATERNAL and CHILD NURSING
Maritess Manalang-Quinto, RN, MAN(c)

FERTILIZATION AND IMPLANTATION
Occurs in the upper region of the fallopian tubes
Occurs within 2 hours of ovulation within 2 to 3 days of insemination
Takes place when sperm and ovum unite
Zygote is propelled toward the uterus
Zygote is implanted 6 to 8 days after ovulation
Blastocyts secretes chorionic gonadotropin to ensure that corpus luteum remains viable and secretes estrogen and progesterone for the first 2 to 3 months of gestation

GERM LAYERS

ECTODERM
- CNS, PNS, skin hair, nails,
sebaceous glands sense organs,
mucous membranes of anus, mouth,
nose, tooth enamel, mammary glands
MESODERM
- Body supporting structures,
dentin of teeth, kidneys ureters, repro syst,
heart, circ syst, blood, lymph vessels
ENDODERM
- bladder, urethra, lining of pericardial,
pleural peritoneal cavities,
lining of GIT, RT, tonsils, thyroid,
parathyroid, thymus
Signs and Symptoms of Pregnancy
1. Indications of Pregnancy
Presumptive signs
Probable signs
Positive signs