An IVF Trigger Shot is an important injection used during in vitro fertilization (IVF) treatment to help mature the eggs before egg retrieval. It is given at a carefully planned time to support the final stage of egg maturation.
What Is an IVF Trigger Shot?
During an IVF cycle, fertility medications stimulate the ovaries to develop multiple eggs. Once the follicles reach the appropriate size, an IVF Trigger Shot is given to help the eggs complete their final maturation so they can be collected during egg retrieval.
When Is the Trigger Shot Given?
The trigger injection is usually administered when the developing follicles are ready for egg retrieval. The timing is very important because egg retrieval is generally scheduled about 34–36 hours after the trigger shot, depending on the treatment plan.
Types of IVF Trigger Shots
Common types include:
- hCG trigger: Mimics the natural LH surge and supports final egg maturation.
- GnRH agonist trigger: May be recommended in certain IVF protocols, particularly when reducing the risk of ovarian hyperstimulation syndrome (OHSS) is important.
- Dual trigger: Combines two medications in selected cases based on the fertility specialist's assessment.
Possible Side Effects
Most people tolerate the trigger injection well. Some may experience mild symptoms such as:
- Injection-site discomfort
- Bloating
- Breast tenderness
- Headache
- Mild abdominal discomfort
Severe abdominal pain, significant swelling, difficulty breathing, or rapid weight gain should be reported to your fertility specialist promptly.
Final Thoughts
The IVF Trigger Shot plays a key role in preparing eggs for retrieval. Since the correct medication and timing depend on follicle development and the individual IVF protocol, the injection should always be taken exactly as instructed by your fertility specialist.
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