BIO 203 EXAM #2

endometrial changes due to implantation (provides an area safe from the mothers immune system for embryo)

Removal of uterine tube containing embryo (licit under double effect)
- Makes future pregs more diff
- Oocyte from that side not able to reach uterus as easily

Removal of embryo from uterine tube, leaving tube intact
-Disagreement on licitness

Produces oocytes, conserves energy, protects against pahtogens

New oocyte needed after the prev one degenerates

Maintaining the endometrium needs a lot of energy

Shedding of the uterine lining cleans tissues of pathogens; cervical mucus also keeps pathogens out for most of cycle

from menustration to ovulation; can be variable. Ovulation cannot be predicted based on menustruation

ovulation to beginning of menustruation; relaitvely constant, menustration can be predicted based on ovulation

Menstrual, proliferative, secretory

Bleeding (day 1 of cycle), surface layer of endometrium lost, but deep layer remains

Onset of menustruation

Lack of follicles (estrogen decreases)

-FSH peaks shortly before ovulation, stims follicle development
-Estrogen levels rise, produced by mature follicle; thickens endometrium, aids implantation, promotes cilia growth in uterine tube, creates fertile cervical mucus
-LH surge occurs (ovulation), causes follicle to become corpus luteum

follicle cells left in ovary after ovulation

Ovulation happens, corpus luteum is created: profuces estorgen and progesterone
-Progesterone rises, thickens cervical mucus, promotes nutrient secretion in uterine tubes, prevents new follicle development, increases body temp

A progestin and xenoestrogens

synthetic progestogen

a group of hormones with a similar chemical structure (progesterone is a natural pregestogen)

molecule that acts similarly to human estrogen

-Block hormonal signals for ovulation
-Create hormonal signals that thicken cervical mucus
-Prevent full growth of endometrial lining

1. Stimulation of oocyte production
2. Removal of multiple oocytes
3. Collection of sperm
4. Combining spwrm and oocytes
5. Embryo preservation
6. Embryo transfer

Injection of sperm into oocyte

Removal of a blastomere for genetic testing

introduction of sperm and oocyte into Fallopian tubes

ART can cause this