Difference Between Cervical Cap and Diaphragm

The main difference between cervical cap and diaphragm is that cervical cap is small and less effective whereas diaphragm is comparatively large and more effective. Cervical Cap requires fewer spermicides while diaphragm requires considerable amounts of spermicides.

The cervical cap, diaphragm, and sponges are barrier methods that help to prevent pregnancy. They block sperms from entering the uterus as they are inserted into the vagina to fix over the cervix. Male and female condoms are such barrier methods that prevent pregnancy as well. 

Key Areas Covered 

1. What is a Cervical Cap
     – Definition, Benefits, Downsides
2. What is a Diaphragm
     – Definition, Benefits, Downsides
3. What are the Similarities Between Cervical Cap and Diaphragm
     – Outline of Common Features
4. What is the Difference Between Cervical Cap and Diaphragm
     – Comparison of Key Differences

Key Terms: Cervical Cap, Contraceptive Devices, Diaphragm, Prevent Pregnancy, Spermicides

What is a Cervical Cap 

The cervical cap is a silicone cup with the shape of a sailor’s hat that serves as a contraceptive device. The only type of cervical cap with the approval of FDA (Food and Drug Administration) in the U. S. is the FemCap. When inserted into the vagina, the cervical cup fits snugly over the cervix. 

Figure 1: Cervical Cap

What is a Diaphragm 

Diaphragm is a method of contraception sized by a health professional, achieving a proper fit. It has a dual method of preventing pregnancy. The dome with the flexible rim covers the cervix while spermicide applied within the diaphragm kills sperms before insertion. However, fresh spermicide should be applied for repeated intercourse. The position of the diaphragm at the cervix is shown in figure 2.

Figure 2: Diaphragm

Similarities Between Cervical Cap and Diaphragm 

• Cervical cap and diaphragm are birth control (contraceptive) barrier methods used to prevent pregnancy. 
• They can be inserted into the vagina
• Both block the entering of sperms into the uterus. 
• They do not contain hormones. 
• They should be used with a spermicide. 
• Both are reusable and can be used for up to 2 years. 
• However, they cannot be used when the woman having her periods.  
• Both should not be used if the woman has a history of Toxic Shock Syndrome. 
• They do not protect against the sexually transmitted diseases (STD’s).  

Difference Between Cervical Cap and Diaphragm 

Definition 

Cervical Cap: A silicone cup with the shape of a sailor’s hat that serves as a contraceptive device

Diaphragm: A method of contraception sized by a health professional, achieving a proper fit

Made up of 

Cervical Cap: Latex or silicon; a thimble-shaped device 

Diaphragm: Thin rubber; has a springy, flexible rim 

Size 

Cervical Cap: Smaller, more rigid, and less noticeable  

Diaphragm: Comparatively large; can be obtained in different sizes 

Spermicidal Substances 

Cervical Cap: Fewer spermicides is required

Diaphragm: Considerable amounts of spermicides is required

Timing 

Cervical Cap: Must stay in place for 6-8 hours, not to exceed 24 hours, after the final sex act

Diaphragm: Must stay in place for 8 hours, not to exceed 48 hours, after the final sex act

Efficiency in Birth Control 

Cervical Cap: 82.6-93.6% 

Diaphragm: 84-94% 

Significance 

Cervical Cap: Good option for those who are unable to use diaphragm due to weak vaginal muscle tone 

Diaphragm: Easily slip out of the vagina 

Safety 

Cervical Cap: Medically safe 

Diaphragm: May cause urinary tract infections 

Conclusion 

Cervical cap is smaller but, a  less effective device that can be used in the birth control as it prevent sperms from entering the uterus. Diaphragm is large than cervical cap and more effectively prevent pregnancy. Hence, the main difference between cervical cap and diaphragm is the structure and the effectiveness of both devices. 

Reference:

1. “Cervical Cap.” Mayo Clinic, Mayo Foundation for Medical Education and Research, 20 Mar. 2018, Available Here
2. “Diaphragm Birth Control | How Diaphragms Prevent Pregnancy.” Planned Parenthood, National – PPFA, Available Here

Image Courtesy:

1. “Cervical Cap” By BruceBlaus – Own work (CC BY-SA 4.0) via Commons wikimedia 
2. “Diaphragm (Contraception)” By Female_Genital_Organs.svg: Dakederivative work: Hic et nunc – Female_Genital_Organs.svg (CC BY-SA 2.5) via Commons Wikimedia