The prevalence of anxiety disorders in expectant mothers was 44.91%. Unemployed pregnant women were more affected (see Table 1). Studies on maternal anxiety prevalence reported rate from 12% to 59% during pregnancy [8] [9] . Basing on Hospital Anxiety and Depression Scale, Lee et al. [10] found a prevalence of anxiety close to 54% in a Chinese population. However, a lower prevalence of anxiety at 23% has been reported by Heyningen et al. [11] , in South Africa basing on the Mini International Neuropsychiatric Interview scale. The variability of those prevalences confirm the extent of anxiety during pregnancy. All the authors agree with adverse effects of anxiety on the pregnancy outcome, mother-child interaction and the infant development. According to Capponi et al. [12] , mothering approaches are modified by a high level of anxiety “even non pathological”, and reflect in mother-child relationships quality. In general, the anxiety specific to pregnancy has numerous consequences on both mother and foetus [1] .

Depressive syndrome prevalence in expectant mothers of Parakou was 35.33%. The third trimester of pregnancy was more depressogenic (see Table 2). And marriage did not protect against depression (see Table 3). In a meta-analysis, Ayano et al. [13] , reported a higher antenatal depression (32.10%) during the third trimester of pregnancy. Although close to the prevalence found in Parakou, that number rather assesses depression particularly at the third trimester (see Table 4). By contrast, Duko et al. [14] , reported 21.5% as prevalence after a similar study in Ethiopia. Basing on Life Event Scale for Pregnancy Women (LESPW) to assess stress at 12 - 16 weeks of pregnancy and at 32 - 36 weeks of pregnancy, 11.1% and 10.3% of expectant mothers developed respectively anxiety and depressive mood in Shanghai MCPC District [15] . The fluctuation of depression prevalences reported in expectant mothers is related to the different tools and the threshold values used.

Lack of education (OR 1.85; IC_95% [1.06 - 3.23]; p = 0.028) and low socioeconomic level (OR 8.643; IC_95% [09 - 17.18]; p = 0.00), have been identified as risk factors for depression in expectant mothers at Parakou (see Table 1 and Table 5). Unemployed expectant mothers are mostly dependent on their partner/spouse and could suffer from deprivation. Van Heyningen et al. [11] , observed that a high social support seemed to reduce the risk for prenatal anxiety in South African expectant mothers who had a low income (OR 0.95; IC_95% [0.91 - 0.99]). Therefore, a good socioeconomic level protects from anxiety and depression during pregnancy [16] . Kinser et al. [17] , reported the income and stressful events as the most important predictors of depression during pregnancy.

Educational levels in the sample varied. The majority had a secondary level (47%). Chan et al. [18] found similar results in China in 2013 (52.4%). Silva et al. [19] , also got the same results (41.1%) in Brazil, in 2017. Whereas Giardinelli et al. [16] reported almost the same frequencies of both secondary (47%) and high level (46.4%) in Italy in 2012. That difference with the observations made at Parakou is due to the fact that this study has been conducted only in public maternities which are not frequented by intellectual expectant mothers.

In the multivariate logistic regression, celibacy was a risk factor (celibacy: OR = 2.18; IC_95% [1.07 - 4.40]; p = 0.026) for depression in expectant mothers (see Table 6). Räisänen et al., [20] in Finland (2014), achieved the same conclusions; (celibacy: OR = 2.86; IC_95% [2.62 - 3.11]). Besides Weobong et al. in Ghana [21] and Duko et al., [14] , reported the lack of social support as a factor significantly associated with depression in pregnancy. So, single expectant mothers can be considered as vulnerable because of their poor support.

The risk of developing anxiety during the third trimester of pregnancy is 2.47 times higher (OR = 2.47; IC_95% [1.68 - 3.64]; p = 0.000) than the one at the 1st trimester (see Table 5). The third trimester is for sure very critical for the management of risky pregnancies. Moreover, the third trimester is the period in which the expectant mother intensively lives the problem of “imaginary/real child” before the childbirth.

A previous spontaneous miscarriage potentiates 3.70 times (OR = 3.70; IC_95% [2.46 - 5.56]; p = 0.001) the risk of developing depression during pregnancy in expectant mothers at Parakou. Zhu et al. [22] , in Singapore (2018) found a similar result (OR = 2.70; IC_95% [1.55 - 4.71]; p < 0.001). A previous induced abortion had the same potential risk for the onset of depression in pregnancy (OR = 3.11; IC_95% [1.81 - 5.32]; p = 0.000). Pregnancy in women is a particular moment for the recurrence of past traumas and bereavements. Here, the underlying psychological constructions for the bereavement are the same [23] . In retrospective and observational study using a large sample including 38,000 pregnancies, Wallwiener et al. [24] , reported 9.3% of depression and 16.9% of anxiety disorders.

A close one or a perinatal death during pregnancy was a risk factor for anxiety (see Table 5). It increases 2.10 times (0R = 2.10; IC_95% [1.26 - 3.50]; p = 0.003) the risk of developing anxiety during pregnancy. Van Heyningen et al. [11] , in South Africa (2017), made the same observation. All those losses assimilated to stressful events had been identified by Bayrampour et al. [25] as predictive factors of anxiety and depression during pregnancy. Alcohol consumption (see Table 6) during pregnancy, was associated with a higher risk of depressive mood (OR = 1.99; IC_95% [1.15 - 3.44]; p = 0.012). This study doesn’t provide information on the impact of maternal addiction to alcohol on the foetus. Easey et al. [26] , reported through a meta-analysis, a positive association between prenatal exposure to alcohol and children with mental health problems proved by more than half of analysis.