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Live birth rate after IVF/ICSI in women with low and extremely low AMH: an age-matched controlled study

Middle East Fertility Society Journal volume 25, Article number: 2 (2020) Cite this article

Abstract

Background

An age-matched controlled study, to assess the outcome of IVF/ICSI in low and extremely low AMH levels in different age groups by comparing the live birth rate

Materials and methods

An age-matched controlled study was done at the Egyptian IVF center, Cairo, Egypt, including 306 infertile women with low AMH levels undergoing IVF/ICSI and an age-matched number of women with normal AMH. The live birth rate in the different age groups according to the AMH level was compared.

Results

There was no significant difference between LBR in the extremely low AMH arm (11.43%) and low AMH (16.4%) (P = 0.24). The LBR was 30.4% in women with normal AMH as compared to 14.7% in all women with AMH below 1 pg/ml (P = 0.002).

The LBR was significantly higher in women below the age of 35 years and women of 35-40 years with normal AMH (33.2% and 31.7%) as compared to LBR in the corresponding age groups with low AMH (18.6% and 13.3%).

Conclusions

There was no difference in the outcome of IVF between patients with low and extremely low AMH levels. Women with normal AMH level resulted in a higher pregnancy rate as compared to women with low AMH level in the same age group. Age is important in determining prognosis of IVF in patients with low levels of AMH.

Background

Anti-Müllerian hormone (AMH) is a dimeric glycoprotein, a member of the transforming growth factor (TGF)-b superfamily [1]. In women, AMH is produced by the granulosa cells (GC) in the preantral and antral follicles [2]. Because serum AMH levels reflect the ovarian follicular pool, any reduction in the number of small, growing follicles may be followed by a reduction in the circulating AMH [3]. AMH is a better marker of the ovarian reserve than age alone and is superior to other markers described in the literature, such as basal FSH, E2, and inhibin B [4]. Age clearly remains the primary determinant of the probability of a live birth after assisted conception, but for any given age, women with higher ovarian reserve and therefore higher circulating AMH levels have a higher success rate than their counterparts with lower AMH [5].

The objective of this work was to study the outcome of IVF/ICSI in infertile women with low AMH levels and extremely low AMH levels in different age groups.

Methods

During the period from January 1, 2015, to March 31, 2016, a total of 390 women with low level of AMH were counseled for IVF/ICSI. AMH was considered to be low with levels 1 ng/ml and below. Levels below 0.5 ng/ml were considered extremely low level. Eighty-four women decided not to be enrolled in the IVF/ICSI program after explaining the poor prognosis in their individual cases. Most of this group had a very low AMH, and their age was above 39 years old.

We enrolled 306 women with low AMH level into our IVF/ICSI program (group A). Group A (n = 306) was subdivided into group A1 (patients below 35 years old, n = 156), group A2 (patients from 35–40 years old, n = 113), and group A3 (patients above 40 years old, n = 37). An age-matched equal number of patients (group B, n = 306) were selected from patients who underwent IVF/ICSI during the same period, and they had AMH levels above 1 ng/ml. Group B was also divided according to the same age group as in GA into three subgroups similar in number, named groups B1, B2, and B3 (Table 3).

All patients in both groups signed our informed consent. Routine AMH was performed for all patients (Beckman Coulter Kit, Beckman Coulter) using the Gen II assay [6].

All enrolled women in group A (n = 306) were treated by the ultrashort protocol of ovarian stimulation. Subcutaneous GnRH-a (0.1 mg) was given daily from the first day of the cycle for 3 days, and 450 IU of RecFSH (Gonal F) or hMG Gonapure (Ferring) was injected daily from day 3 of the cycle. Human chorionic gonadotropin (Choriomon 10,000 IU, IBSA) was given when the leading follicle reached 17 mm. Luteal phase support in the form of 400 mg vaginal natural progesterone (Prontogest, IBSA) was provided. The criteria for cycle cancelation were the presence of less than three follicles with an E2 level less than 400 pg/ml. Women in group B n = 306 were treated with our routine long GnRH-a protocol which was published before [3].

Ethical approval was obtained from The Internal Ethical committee of the Egyptian IVF Center in December 2014 (approval number: 2014/017).

The study outcome was to compare the live birth rate in the different age groups according to the AMH level.

Statistical analysis

Data were statistically described in terms of mean ± standard deviation (± SD), 95% CI, frequencies (number of cases), and percentages when appropriate. Comparison of numerical variables between the study groups was done using the Student t test for independent samples in comparing two groups of normally distributed data and the Mann-Whitney U test for independent samples for comparing not normal data. For comparing categorical data, the chi-square (χ2) test was performed. The exact test was used instead when the expected frequency is less than 5. P values less than 0.05 were considered statistically significant. All statistical calculations were done using computer program IBM SPSS (Statistical Package for the Social Science; IBM Corp, USA) release 22 for Microsoft Windows.

Results

There was no significant difference in mean age between groups A and B (Table 1). The mean level of AMH in group A (0.59 ± 0.25) was significantly lower than the mean level of group B (3.93 ± 2.74) (95% CI − 3.642 to − 3.0243).

Table 1 Clinical outcome in women with normal and low AMH levels
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In group A, the mean number of oocytes retrieved was 5.74 ± 3.71 and the mean number of cleaved embryos was 3.51 ± 2.394 as compared to 12.69 ± 6.10 and 5.77 ± 3.51 in group B respectively (Table 1, Figs. 1, 2, 3 and 4).

Fig. 1
figure1

Correlation between AMH level and total oocytes among cases with AMH < 1

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Fig. 2
figure2

Correlation between AMH level and total embryos among cases with AMH < 1

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Fig. 3
figure3

Correlation between AMH level and total oocytes among cases with AMH > 1

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Fig. 4
figure4

Correlation between AMH level and total embryos among cases with AMH > 1

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The number of women who did not retrieve oocytes was 7 in group A and 1 in group B. The number of patients who achieved embryo transfer was 228 (74.5%) in group A and 287 (93.8%) in group B (< 0.001) (Table 1). The clinical pregnancy rate and the live birth rate per started cycle were 19.6% and 14.7% in group A as compared to 35.9% and 30.4% in the control group B respectively, P value < 0.05 (Table 1).

There was no significant difference in clinical and live birth rates between patients with AMH levels below 0.5 ng/ml as compared to AMH levels above 0.5 and below 1 ng/ml (Table 2).

Table 2 Clinical outcome in low and extremely low AMH
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In patients with very low AMH, the clinical pregnancy and the live birth rates were 17% and 11% as compared to 21% and 16% in women with AMH between 0.5 and 1 ng/ml respectively. The difference was not significant (Table 2).

The mean number of oocytes retrieved, mean number of cleaved embryos, number of patients who had embryo transfer, and number of patients with total failure of fertilization in groups A and B in all age subgroups are presented in Table 3.

Table 3 Clinical data in all patient groups
Full size table

Discussion

The present study has shown that both age and AMH are important factors for determining the outcome of IVF/ICSI. Comparing an age-matched group of women with normal AMH level to the study group, the mean clinical and live birth rates were significantly higher in women with normal AMH. This denotes that low AMH reduces pregnancy rates in IVF/ICSI patients at all age groups. However, there was no significant difference in clinical or live birth rates between the low and the extremely low AMH, in the same age group. In women with low level of AMH, age became the most important prognostic factor and not how low AMH level is.

Based on this study, the age becomes the crucial factor during counseling. Even one or two oocytes can result in a reasonable pregnancy rate in this group of young women.

AMH has been gaining popularity as its intra-cycle stability makes it a more convenient tool [7, 8].

Evidence is accumulating suggesting that AMH is the best currently available test in terms of sensitivity and specificity. However, it should be combined with age, to allow for a better assessment of the fertility potential of a given woman [9].

The immediate clinical implication of the present finding is that AMH combined with age provides strong information for couples considering assisted reproduction. However, its diagnostic accuracy in live birth alone is poor and could not be used to alter clinical decisions. Adoption of an AMH threshold for access to assisted reproduction was not possible in our study as the live birth rate in the same age group did not differ between low and very low AMH levels.

Several studies evaluated the outcome of IVF/ICSI in extremely low levels of AMH. It was reported in a study with 101 women and 188 embryos with extremely low AMH levels (below 0.4 ng/ml) that pregnancy can be achieved in this group and AMH helped to counsel the patients [10]. In another study, the chance of pregnancy and the number of obtained embryos, high-quality embryos, and transferred embryos were positively correlated with the level of AMH. Therefore, it might be argued that the correlation between AMH and pregnancy depends on the number of obtained oocytes and embryos available for transfer, rather than embryo quality. So, although AMH levels might compromise pregnancy outcomes, lower levels of AMH do not impair the embryo developmental competence [11].

A study of 128 women with extremely low AMH concentrations (below 0.4 ng/ml), including 70 women aged < 42 years, resulted in 16 clinical pregnancies and 10 deliveries [12].

Counseling women with extremely low AMH concentrations can be difficult, because the predictive value for AMH concentrations is not absolute; its false-positive rate may have previously prohibited women from entering an IVF program [12].

In the prediction of a live birth following IVF, a distinction, however moderate, can be made between couples with a good and a poor prognosis. The success of IVF was found to mainly depend on maternal age and serum AMH concentrations, one of the most relevant and valuable markers of ovarian reserve [13]. Age, AMH, AFC, and cause, when sub-classified, are independently associated with the results of an IVF/ICSI treatment. These results enable couples to face real expectations in their particular scenario [14].

Women with very low AMH levels (< 0.5 ng/mL) undergoing IVF still have a chance of achieving a pregnancy, but their prognosis is significantly affected by chronological age. Very low AMH levels are associated with a relevant risk of cycle cancelation but should not be considered a reason to exclude a couple from IVF [15].

In young patients with low AMH levels who have good quality embryos, AMH is not associated with clinical pregnancy, spontaneous miscarriage, or live birth rates [16].

Conclusion

Our study showed the importance of age in determining prognosis of IVF in patients with low levels of AMH. There was no difference in the outcome of IVF between low and extremely low AMH levels. Women with normal AMH level resulted in higher pregnancy rate as compared to women with low AMH level in the same age group.

Availability of data and materials

The datasets used and/or analyzed during the current study are available from the corresponding author on reasonable request.

Abbreviations

AMH:

Anti-Mullerian hormone

E2:

Estradiol

FSH:

Follicle-stimulating hormone

GC:

Granulose cells

GnRH-a:

Gonadotropin-releasing hormone agonist

hMG:

Human menopausal gonadotropins

IVF/ICS:

In vitro fertilization/intracytoplasmic sperm injection

LBR:

Live birth rate

RecFSH:

Recombinant follicle-stimulating hormone

TGF:

Transforming growth factor

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Acknowledgements

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Affiliations

  1. The Egyptian IVF Center, 3 Street No. 161 Hadayek El-Maadi, Cairo, 11431, Egypt

    Yomna I. Zaghloul, Yahia M. Amin, Ragaa T. Mansour, Ahmed Serour, Mona M. Aboulghar, Mohamed A. Aboulghar & Gamal I. Serour

  2. Faculty of Medicine, Cairo University, Cairo, Egypt

    Yomna I. Zaghloul, Mona M. Aboulghar & Mohamed A. Aboulghar

  3. Faculty of Medicine, AlAzhar University, Cairo, Egypt

    Ahmed Serour & Gamal I. Serour

Authors
  1. Yomna I. Zaghloul
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  2. Yahia M. Amin
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  3. Ragaa T. Mansour
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  4. Ahmed Serour
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  5. Mona M. Aboulghar
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  6. Mohamed A. Aboulghar
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  7. Gamal I. Serour
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Contributions

YZ collected, analyzed, and interpreted the patients’ data. MMA was a major contributor in writing the manuscript. All authors read and approved the final manuscript.

Corresponding author

Correspondence to Yomna I. Zaghloul.

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Ethics approval and consent to participate

Ethical approval was obtained from The Internal Ethical committee of the Egyptian IVF Center in December 2014 (approval number: 2014/017). Written informed consent was obtained from every patient who participated in the research.

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Competing interests

The authors declare that they have no competing interests.

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Zaghloul, Y.I., Amin, Y.M., Mansour, R.T. et al. Live birth rate after IVF/ICSI in women with low and extremely low AMH: an age-matched controlled study. Middle East Fertil Soc J 25, 2 (2020). https://doi.org/10.1186/s43043-019-0014-x

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Keywords

  • AMH
  • IVF/ICSI
  • Pregnancy rates
  • LBR
  • Age