Fertility challenges can be a roadblock for many aspiring parents. Among the various treatments available, the role of trigger injections and ovulation induction have emerged as significant aids in the journey towards conception. This blog post will delve into the intricacies of these treatments, their mechanisms, and their impact on fertility.

Trigger Injections: The Final Push Towards Ovulation

Trigger injections, commonly known as “trigger shots,” are used to induce ovulation. They contain the hormone human chorionic gonadotropin (hCG), which mimics the natural luteinising hormone (LH) surge that triggers ovulation. When eggs are almost mature, a trigger injection is administered to prompt the ovaries to release an egg.

Common types of Trigger Injections

  • Ovitrelle/ Ovidrel: Composed of recombinant hCG and used in various fertility treatments, including timed intercourse, IUI, and IVF.
  • Pregnyl/ Gonasi: A brand name for urinary-extracted hCG, used similarly to Ovitrelle.

Ovulation Induction: Stimulating Egg Production

Ovulation induction is a process used when a woman does not ovulate regularly. Medications or injections are administered to stimulate the ovaries to produce eggs. This treatment is particularly beneficial for conditions like Polycystic Ovarian Syndrome (PCOS) or hormonal imbalances.

Medications Used in Ovulation Induction

  • Clomiphene or Clomid: Tablets that increase the production of FSH, stimulating follicles and egg growth.
  • Gonadotrophins: Injections containing FSH, such as Menopur, Gonal F, and Bemfola, given daily to stimulate egg production. Often used if tablets are ineffective.

Monitoring, Trigger Injections and Success Rates

The response to these medications is monitored through ultrasound scans. If the response is too weak or too strong, adjustments are made, or the cycle may be restarted. Success rates vary based on individual circumstances, but these treatments have helped many achieve their dream of parenthood.


Trigger injections and ovulation induction are powerful tools in the field of reproductive medicine. By understanding and utilising these treatments, many couples have overcome fertility barriers and moved closer to starting a family.

For those considering these treatments, it’s essential to consult with a fertility specialist to understand the best approach for your unique situation. With the right guidance and support, the dream of parenthood is within reach.

What if I want to enquire about having a Trigger Injections, or I have any questions?

If you would like more information or have any questions during your treatment, please ring or email Mandy Banbury, secretary to Mr Dobson.

Mandy Banbury:

Tel: 0115 966 2111 (Tues/ Wed/ Thurs)

Email: mandy.banbury@circlehealthgroup.co.uk