Lecture 5.1: Contraception and Fertility Problems Flashcards
What is the Definition of Contraception?
The deliberate use of artificial methods or other techniques to prevent pregnancy as a consequence of sexual intercourse
Who should use contraception: Women
- Menarche to 55yrs
- If stopped bleeding and are > 50, no need for
contraception after 1 year of no bleeding - If stopped bleeding and are 50 or under, no need for
contraception after 2 years of no bleeding
Who should use contraception: Men
Throughout reproductive life
What is a Vasectomy?
It it contraception that reduces sperm count by dividing the vas defrens
What is the failure rate of a vasectomy?
1 in 2000
What is the regret percentage of a vasectomy?
2%
What is contraception by timing of coitus?
Not to have coitus in fertile calendar period
What are some Fertility Awareness Methods (7)
- Abstinence in a calendar cycle
- Basal body temperature
- Cervical mucous
- Cervical positioning
- Lactational amenorrhoea
- Coitus interruptus/withdrawal
- Urine home LH tests
Examples of contraception by methods which prevent sperm from entering the cervix (5)
- Male Condom
- Female Condom
- Female Diaphragm
- Female Cervical Cap
- Progesterone Only Pill
How does a male condom prevent sperm from entering the cervix? How effective is it?
- Barrier method
- With correct use, 98% efficacy
How does a female condom prevent sperm from entering the cervix?
- Barrier method
- With correct use, 95% efficacy
How does effective is a female diaphragm? What other contraceptive method does it need to be used with?
- ~95% effective
- Use with spermicide
How does effective is a female cervical cap? What other contraceptive method does it need to be used with?
- Use with spermicide
- ~ 95% effective
How does a progesterone only pill prevent sperm from entering the cervix?
- Thickens cervical mucous
- If taken correctly 99% effective (but 92% in most
women)
Examples of contraception to prevent ovulation (4)
- Combined Hormone Contraception
- Progestogen only pill (some)
- Progestogen subdermal implant
- Progestogen injectable
What is the Combined Hormone Contraception? How effective is it?
- Oestrogen and progestogen
- Effective > 99%
What are the benefits of the Combined Hormone Contraception? (3)
- Predictable bleeding pattern
- Helps heavy menstrual bleeding
- Helps painful periods
What are the risks/side-effects of the Combined Hormone Contraception? (7)
- Risk of M.I
- Risk of Stroke
- Risk of VTE
- Headaches
- Nausea
- Breast Tenderness
- Mood Swings
What other changes occur when taking Combined Hormone Contraception? (3)
- Cervical mucous
- Tubal motility
- Endometrial changes
What are the 3 Methods of Combined Hormone Contraception?
- Oral Tablet
- Vaginal Ring (Nuvaring)
- Transdermal Patch (Evra)
How is the Oral Tablet taken?
- Take 1 tablet daily for 21 days
- Then 7 days hormone-free-interval (HFI)
- Then repeat
- Tailored regimes available
- Monophasic
How is the Nuvaring used?
- 1 ring into the vagina for 21 days
- Removed for 7 days for a hormone free-interval (HFI)
- Then repeat
- Tailored regimes available
How is a Transdermal Patch used?
- Apply 1 new patch every week
- Repeat for 3 weeks and then a 7 day hormone free
interval (HFI) - Tailored regimes available.
How effective is the progestogen sub-dermal
implant (Nexplanon)?
> 99%
How is the progestogen sub-dermal implant inserted? How long does it last?
- Inserted in the upper arm
- Local anaesthetic
- Lasts for 3 years
What is the most common side-effect of the progestogen sub-dermal implant?
Irregular bleeding
How is the progestogen injectable used?
- Intra-muscular injection (into gluteal or deltoid)
- Or subcutaneous injection (anterior thigh or abdomen)
- Every 13 weeks
How effective is the progestogen injectable?
> 99%
What are the side-effects of the progestogen injectable? (4)
- Amenorrhoea
- Only contraception ass.with weight gain
- Bone thinning – resolves with discontinuation
- Delay in fertility up to 12 months
Contraception by blocking the sperm meeting the ovum in the Fallopian tube: Tubal Ligation
- Female sterilisation
- ‘Filshie clips’ on each F.tube
What is the failure rate of Tubal Ligation?
1 in 200
What is an Intra-uterine copper device (IUCD)? How does it work? How effective is it?
- Copper wire
- Contraception due to copper toxicity to sperm
- > 99%
What is an Intra-uterine system (IUS)? How does it work? How effective is it?
- Progestogen
- MoA: Pre-fertilisation due to foreign body affect and
endometrial thinning - > 99%
How long does an IUCD last?
5-10 years
How long does an IUS last?
3-6 years
What are the options for Emergency Contraception (3)
- Levonorgestrel/‘Levonelle’ (tablet)
- Ulipristal/‘EllaOne’ (tablet)
- Intra-Uterine Copper Device (IUCD)